ALSA-Configuration.txt 66 KB

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  1. Advanced Linux Sound Architecture - Driver
  2. ==========================================
  3. Configuration guide
  4. Kernel Configuration
  5. ====================
  6. To enable ALSA support you need at least to build the kernel with
  7. primary sound card support (CONFIG_SOUND). Since ALSA can emulate OSS,
  8. you don't have to choose any of the OSS modules.
  9. Enable "OSS API emulation" (CONFIG_SND_OSSEMUL) and both OSS mixer and
  10. PCM supports if you want to run OSS applications with ALSA.
  11. If you want to support the WaveTable functionality on cards such as
  12. SB Live! then you need to enable "Sequencer support"
  13. (CONFIG_SND_SEQUENCER).
  14. To make ALSA debug messages more verbose, enable the "Verbose printk"
  15. and "Debug" options. To check for memory leaks, turn on "Debug memory"
  16. too. "Debug detection" will add checks for the detection of cards.
  17. Please note that all the ALSA ISA drivers support the Linux isapnp API
  18. (if the card supports ISA PnP). You don't need to configure the cards
  19. using isapnptools.
  20. Creating ALSA devices
  21. =====================
  22. This depends on your distribution, but normally you use the /dev/MAKEDEV
  23. script to create the necessary device nodes. On some systems you use a
  24. script named 'snddevices'.
  25. Module parameters
  26. =================
  27. The user can load modules with options. If the module supports more than
  28. one card and you have more than one card of the same type then you can
  29. specify multiple values for the option separated by commas.
  30. Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
  31. Module snd
  32. ----------
  33. The core ALSA module. It is used by all ALSA card drivers.
  34. It takes the following options which have global effects.
  35. major - major number for sound driver
  36. - Default: 116
  37. cards_limit
  38. - limiting card index for auto-loading (1-8)
  39. - Default: 1
  40. - For auto-loading more than one card, specify this
  41. option together with snd-card-X aliases.
  42. device_mode
  43. - permission mask for dynamic sound device filesystem
  44. - This is available only when DEVFS is enabled
  45. - Default: 0666
  46. - E.g.: device_mode=0660
  47. Module snd-pcm-oss
  48. ------------------
  49. The PCM OSS emulation module.
  50. This module takes options which change the mapping of devices.
  51. dsp_map - PCM device number maps assigned to the 1st OSS device.
  52. - Default: 0
  53. adsp_map - PCM device number maps assigned to the 2st OSS device.
  54. - Default: 1
  55. nonblock_open
  56. - Don't block opening busy PCM devices. Default: 1
  57. For example, when dsp_map=2, /dev/dsp will be mapped to PCM #2 of
  58. the card #0. Similarly, when adsp_map=0, /dev/adsp will be mapped
  59. to PCM #0 of the card #0.
  60. For changing the second or later card, specify the option with
  61. commas, such like "dsp_map=0,1".
  62. nonblock_open option is used to change the behavior of the PCM
  63. regarding opening the device. When this option is non-zero,
  64. opening a busy OSS PCM device won't be blocked but return
  65. immediately with EAGAIN (just like O_NONBLOCK flag).
  66. Module snd-rawmidi
  67. ------------------
  68. This module takes options which change the mapping of devices.
  69. similar to those of the snd-pcm-oss module.
  70. midi_map - MIDI device number maps assigned to the 1st OSS device.
  71. - Default: 0
  72. amidi_map - MIDI device number maps assigned to the 2st OSS device.
  73. - Default: 1
  74. Common parameters for top sound card modules
  75. --------------------------------------------
  76. Each of top level sound card module takes the following options.
  77. index - index (slot #) of sound card
  78. - Values: 0 through 31 or negative
  79. - If nonnegative, assign that index number
  80. - if negative, interpret as a bitmask of permissible
  81. indices; the first free permitted index is assigned
  82. - Default: -1
  83. id - card ID (identifier or name)
  84. - Can be up to 15 characters long
  85. - Default: the card type
  86. - A directory by this name is created under /proc/asound/
  87. containing information about the card
  88. - This ID can be used instead of the index number in
  89. identifying the card
  90. enable - enable card
  91. - Default: enabled, for PCI and ISA PnP cards
  92. Module snd-adlib
  93. ----------------
  94. Module for AdLib FM cards.
  95. port - port # for OPL chip
  96. This module supports multiple cards. It does not support autoprobe, so
  97. the port must be specified. For actual AdLib FM cards it will be 0x388.
  98. Note that this card does not have PCM support and no mixer; only FM
  99. synthesis.
  100. Make sure you have "sbiload" from the alsa-tools package available and,
  101. after loading the module, find out the assigned ALSA sequencer port
  102. number through "sbiload -l". Example output:
  103. Port Client name Port name
  104. 64:0 OPL2 FM synth OPL2 FM Port
  105. Load the std.sb and drums.sb patches also supplied by sbiload:
  106. sbiload -p 64:0 std.sb drums.sb
  107. If you use this driver to drive an OPL3, you can use std.o3 and drums.o3
  108. instead. To have the card produce sound, use aplaymidi from alsa-utils:
  109. aplaymidi -p 64:0 foo.mid
  110. Module snd-ad1816a
  111. ------------------
  112. Module for sound cards based on Analog Devices AD1816A/AD1815 ISA chips.
  113. port - port # for AD1816A chip (PnP setup)
  114. mpu_port - port # for MPU-401 UART (PnP setup)
  115. fm_port - port # for OPL3 (PnP setup)
  116. irq - IRQ # for AD1816A chip (PnP setup)
  117. mpu_irq - IRQ # for MPU-401 UART (PnP setup)
  118. dma1 - first DMA # for AD1816A chip (PnP setup)
  119. dma2 - second DMA # for AD1816A chip (PnP setup)
  120. clockfreq - Clock frequency for AD1816A chip (default = 0, 33000Hz)
  121. This module supports multiple cards, autoprobe and PnP.
  122. Module snd-ad1848
  123. -----------------
  124. Module for sound cards based on AD1848/AD1847/CS4248 ISA chips.
  125. port - port # for AD1848 chip
  126. irq - IRQ # for AD1848 chip
  127. dma1 - DMA # for AD1848 chip (0,1,3)
  128. This module supports multiple cards. It does not support autoprobe
  129. thus main port must be specified!!! Other ports are optional.
  130. The power-management is supported.
  131. Module snd-ad1889
  132. -----------------
  133. Module for Analog Devices AD1889 chips.
  134. ac97_quirk - AC'97 workaround for strange hardware
  135. See the description of intel8x0 module for details.
  136. This module supports multiple cards.
  137. Module snd-ali5451
  138. ------------------
  139. Module for ALi M5451 PCI chip.
  140. pcm_channels - Number of hardware channels assigned for PCM
  141. spdif - Support SPDIF I/O
  142. - Default: disabled
  143. This module supports one chip and autoprobe.
  144. The power-management is supported.
  145. Module snd-als100
  146. -----------------
  147. Module for sound cards based on Avance Logic ALS100/ALS120 ISA chips.
  148. port - port # for ALS100 (SB16) chip (PnP setup)
  149. irq - IRQ # for ALS100 (SB16) chip (PnP setup)
  150. dma8 - 8-bit DMA # for ALS100 (SB16) chip (PnP setup)
  151. dma16 - 16-bit DMA # for ALS100 (SB16) chip (PnP setup)
  152. mpu_port - port # for MPU-401 UART (PnP setup)
  153. mpu_irq - IRQ # for MPU-401 (PnP setup)
  154. fm_port - port # for OPL3 FM (PnP setup)
  155. This module supports multiple cards, autoprobe and PnP.
  156. The power-management is supported.
  157. Module snd-als300
  158. -----------------
  159. Module for Avance Logic ALS300 and ALS300+
  160. This module supports multiple cards.
  161. The power-management is supported.
  162. Module snd-als4000
  163. ------------------
  164. Module for sound cards based on Avance Logic ALS4000 PCI chip.
  165. joystick_port - port # for legacy joystick support.
  166. 0 = disabled (default), 1 = auto-detect
  167. This module supports multiple cards, autoprobe and PnP.
  168. The power-management is supported.
  169. Module snd-atiixp
  170. -----------------
  171. Module for ATI IXP 150/200/250/400 AC97 controllers.
  172. ac97_clock - AC'97 clock (default = 48000)
  173. ac97_quirk - AC'97 workaround for strange hardware
  174. See "AC97 Quirk Option" section below.
  175. spdif_aclink - S/PDIF transfer over AC-link (default = 1)
  176. This module supports one card and autoprobe.
  177. ATI IXP has two different methods to control SPDIF output. One is
  178. over AC-link and another is over the "direct" SPDIF output. The
  179. implementation depends on the motherboard, and you'll need to
  180. choose the correct one via spdif_aclink module option.
  181. The power-management is supported.
  182. Module snd-atiixp-modem
  183. -----------------------
  184. Module for ATI IXP 150/200/250 AC97 modem controllers.
  185. This module supports one card and autoprobe.
  186. Note: The default index value of this module is -2, i.e. the first
  187. slot is excluded.
  188. The power-management is supported.
  189. Module snd-au8810, snd-au8820, snd-au8830
  190. -----------------------------------------
  191. Module for Aureal Vortex, Vortex2 and Advantage device.
  192. pcifix - Control PCI workarounds
  193. 0 = Disable all workarounds
  194. 1 = Force the PCI latency of the Aureal card to 0xff
  195. 2 = Force the Extend PCI#2 Internal Master for Efficient
  196. Handling of Dummy Requests on the VIA KT133 AGP Bridge
  197. 3 = Force both settings
  198. 255 = Autodetect what is required (default)
  199. This module supports all ADB PCM channels, ac97 mixer, SPDIF, hardware
  200. EQ, mpu401, gameport. A3D and wavetable support are still in development.
  201. Development and reverse engineering work is being coordinated at
  202. http://savannah.nongnu.org/projects/openvortex/
  203. SPDIF output has a copy of the AC97 codec output, unless you use the
  204. "spdif" pcm device, which allows raw data passthru.
  205. The hardware EQ hardware and SPDIF is only present in the Vortex2 and
  206. Advantage.
  207. Note: Some ALSA mixer applications don't handle the SPDIF sample rate
  208. control correctly. If you have problems regarding this, try
  209. another ALSA compliant mixer (alsamixer works).
  210. Module snd-azt2320
  211. ------------------
  212. Module for sound cards based on Aztech System AZT2320 ISA chip (PnP only).
  213. port - port # for AZT2320 chip (PnP setup)
  214. wss_port - port # for WSS (PnP setup)
  215. mpu_port - port # for MPU-401 UART (PnP setup)
  216. fm_port - FM port # for AZT2320 chip (PnP setup)
  217. irq - IRQ # for AZT2320 (WSS) chip (PnP setup)
  218. mpu_irq - IRQ # for MPU-401 UART (PnP setup)
  219. dma1 - 1st DMA # for AZT2320 (WSS) chip (PnP setup)
  220. dma2 - 2nd DMA # for AZT2320 (WSS) chip (PnP setup)
  221. This module supports multiple cards, PnP and autoprobe.
  222. The power-management is supported.
  223. Module snd-azt3328
  224. ------------------
  225. Module for sound cards based on Aztech AZF3328 PCI chip.
  226. joystick - Enable joystick (default off)
  227. This module supports multiple cards.
  228. Module snd-bt87x
  229. ----------------
  230. Module for video cards based on Bt87x chips.
  231. digital_rate - Override the default digital rate (Hz)
  232. load_all - Load the driver even if the card model isn't known
  233. This module supports multiple cards.
  234. Note: The default index value of this module is -2, i.e. the first
  235. slot is excluded.
  236. Module snd-ca0106
  237. -----------------
  238. Module for Creative Audigy LS and SB Live 24bit
  239. This module supports multiple cards.
  240. Module snd-cmi8330
  241. ------------------
  242. Module for sound cards based on C-Media CMI8330 ISA chips.
  243. wssport - port # for CMI8330 chip (WSS)
  244. wssirq - IRQ # for CMI8330 chip (WSS)
  245. wssdma - first DMA # for CMI8330 chip (WSS)
  246. sbport - port # for CMI8330 chip (SB16)
  247. sbirq - IRQ # for CMI8330 chip (SB16)
  248. sbdma8 - 8bit DMA # for CMI8330 chip (SB16)
  249. sbdma16 - 16bit DMA # for CMI8330 chip (SB16)
  250. This module supports multiple cards and autoprobe.
  251. The power-management is supported.
  252. Module snd-cmipci
  253. -----------------
  254. Module for C-Media CMI8338 and 8738 PCI sound cards.
  255. mpu_port - 0x300,0x310,0x320,0x330 = legacy port,
  256. 1 = integrated PCI port,
  257. 0 = disable (default)
  258. fm_port - 0x388 (default), 0 = disable (default)
  259. soft_ac3 - Software-conversion of raw SPDIF packets (model 033 only)
  260. (default = 1)
  261. joystick_port - Joystick port address (0 = disable, 1 = auto-detect)
  262. This module supports autoprobe and multiple cards.
  263. The power-management is supported.
  264. Module snd-cs4231
  265. -----------------
  266. Module for sound cards based on CS4231 ISA chips.
  267. port - port # for CS4231 chip
  268. mpu_port - port # for MPU-401 UART (optional), -1 = disable
  269. irq - IRQ # for CS4231 chip
  270. mpu_irq - IRQ # for MPU-401 UART
  271. dma1 - first DMA # for CS4231 chip
  272. dma2 - second DMA # for CS4231 chip
  273. This module supports multiple cards. This module does not support autoprobe
  274. thus main port must be specified!!! Other ports are optional.
  275. The power-management is supported.
  276. Module snd-cs4232
  277. -----------------
  278. Module for sound cards based on CS4232/CS4232A ISA chips.
  279. port - port # for CS4232 chip (PnP setup - 0x534)
  280. cport - control port # for CS4232 chip (PnP setup - 0x120,0x210,0xf00)
  281. mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
  282. fm_port - FM port # for CS4232 chip (PnP setup - 0x388), -1 = disable
  283. irq - IRQ # for CS4232 chip (5,7,9,11,12,15)
  284. mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
  285. dma1 - first DMA # for CS4232 chip (0,1,3)
  286. dma2 - second DMA # for Yamaha CS4232 chip (0,1,3), -1 = disable
  287. isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
  288. This module supports multiple cards. This module does not support autoprobe
  289. thus main port must be specified!!! Other ports are optional.
  290. The power-management is supported.
  291. Module snd-cs4236
  292. -----------------
  293. Module for sound cards based on CS4235/CS4236/CS4236B/CS4237B/
  294. CS4238B/CS4239 ISA chips.
  295. port - port # for CS4236 chip (PnP setup - 0x534)
  296. cport - control port # for CS4236 chip (PnP setup - 0x120,0x210,0xf00)
  297. mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
  298. fm_port - FM port # for CS4236 chip (PnP setup - 0x388), -1 = disable
  299. irq - IRQ # for CS4236 chip (5,7,9,11,12,15)
  300. mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
  301. dma1 - first DMA # for CS4236 chip (0,1,3)
  302. dma2 - second DMA # for CS4236 chip (0,1,3), -1 = disable
  303. isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
  304. This module supports multiple cards. This module does not support autoprobe
  305. (if ISA PnP is not used) thus main port and control port must be
  306. specified!!! Other ports are optional.
  307. The power-management is supported.
  308. Module snd-cs4281
  309. -----------------
  310. Module for Cirrus Logic CS4281 soundchip.
  311. dual_codec - Secondary codec ID (0 = disable, default)
  312. This module supports multiple cards.
  313. The power-management is supported.
  314. Module snd-cs46xx
  315. -----------------
  316. Module for PCI sound cards based on CS4610/CS4612/CS4614/CS4615/CS4622/
  317. CS4624/CS4630/CS4280 PCI chips.
  318. external_amp - Force to enable external amplifier.
  319. thinkpad - Force to enable Thinkpad's CLKRUN control.
  320. mmap_valid - Support OSS mmap mode (default = 0).
  321. This module supports multiple cards and autoprobe.
  322. Usually external amp and CLKRUN controls are detected automatically
  323. from PCI sub vendor/device ids. If they don't work, give the options
  324. above explicitly.
  325. The power-management is supported.
  326. Module snd-cs5535audio
  327. ----------------------
  328. Module for multifunction CS5535 companion PCI device
  329. The power-management is supported.
  330. Module snd-darla20
  331. ------------------
  332. Module for Echoaudio Darla20
  333. This module supports multiple cards.
  334. The driver requires the firmware loader support on kernel.
  335. Module snd-darla24
  336. ------------------
  337. Module for Echoaudio Darla24
  338. This module supports multiple cards.
  339. The driver requires the firmware loader support on kernel.
  340. Module snd-dt019x
  341. -----------------
  342. Module for Diamond Technologies DT-019X / Avance Logic ALS-007 (PnP
  343. only)
  344. port - Port # (PnP setup)
  345. mpu_port - Port # for MPU-401 (PnP setup)
  346. fm_port - Port # for FM OPL-3 (PnP setup)
  347. irq - IRQ # (PnP setup)
  348. mpu_irq - IRQ # for MPU-401 (PnP setup)
  349. dma8 - DMA # (PnP setup)
  350. This module supports multiple cards. This module is enabled only with
  351. ISA PnP support.
  352. The power-management is supported.
  353. Module snd-dummy
  354. ----------------
  355. Module for the dummy sound card. This "card" doesn't do any output
  356. or input, but you may use this module for any application which
  357. requires a sound card (like RealPlayer).
  358. The power-management is supported.
  359. Module snd-echo3g
  360. -----------------
  361. Module for Echoaudio 3G cards (Gina3G/Layla3G)
  362. This module supports multiple cards.
  363. The driver requires the firmware loader support on kernel.
  364. Module snd-emu10k1
  365. ------------------
  366. Module for EMU10K1/EMU10k2 based PCI sound cards.
  367. * Sound Blaster Live!
  368. * Sound Blaster PCI 512
  369. * Emu APS (partially supported)
  370. * Sound Blaster Audigy
  371. extin - bitmap of available external inputs for FX8010 (see bellow)
  372. extout - bitmap of available external outputs for FX8010 (see bellow)
  373. seq_ports - allocated sequencer ports (4 by default)
  374. max_synth_voices - limit of voices used for wavetable (64 by default)
  375. max_buffer_size - specifies the maximum size of wavetable/pcm buffers
  376. given in MB unit. Default value is 128.
  377. enable_ir - enable IR
  378. This module supports multiple cards and autoprobe.
  379. Input & Output configurations [extin/extout]
  380. * Creative Card wo/Digital out [0x0003/0x1f03]
  381. * Creative Card w/Digital out [0x0003/0x1f0f]
  382. * Creative Card w/Digital CD in [0x000f/0x1f0f]
  383. * Creative Card wo/Digital out + LiveDrive [0x3fc3/0x1fc3]
  384. * Creative Card w/Digital out + LiveDrive [0x3fc3/0x1fcf]
  385. * Creative Card w/Digital CD in + LiveDrive [0x3fcf/0x1fcf]
  386. * Creative Card wo/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
  387. * Creative Card w/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
  388. * Creative Card w/Digital CD in + Digital I/O 2 [0x0fcf/0x1f0f]
  389. * Creative Card 5.1/w Digital out + LiveDrive [0x3fc3/0x1fff]
  390. * Creative Card 5.1 (c) 2003 [0x3fc3/0x7cff]
  391. * Creative Card all ins and outs [0x3fff/0x7fff]
  392. The power-management is supported.
  393. Module snd-emu10k1x
  394. -------------------
  395. Module for Creative Emu10k1X (SB Live Dell OEM version)
  396. This module supports multiple cards.
  397. Module snd-ens1370
  398. ------------------
  399. Module for Ensoniq AudioPCI ES1370 PCI sound cards.
  400. * SoundBlaster PCI 64
  401. * SoundBlaster PCI 128
  402. joystick - Enable joystick (default off)
  403. This module supports multiple cards and autoprobe.
  404. The power-management is supported.
  405. Module snd-ens1371
  406. ------------------
  407. Module for Ensoniq AudioPCI ES1371 PCI sound cards.
  408. * SoundBlaster PCI 64
  409. * SoundBlaster PCI 128
  410. * SoundBlaster Vibra PCI
  411. joystick_port - port # for joystick (0x200,0x208,0x210,0x218),
  412. 0 = disable (default), 1 = auto-detect
  413. This module supports multiple cards and autoprobe.
  414. The power-management is supported.
  415. Module snd-es968
  416. ----------------
  417. Module for sound cards based on ESS ES968 chip (PnP only).
  418. port - port # for ES968 (SB8) chip (PnP setup)
  419. irq - IRQ # for ES968 (SB8) chip (PnP setup)
  420. dma1 - DMA # for ES968 (SB8) chip (PnP setup)
  421. This module supports multiple cards, PnP and autoprobe.
  422. The power-management is supported.
  423. Module snd-es1688
  424. -----------------
  425. Module for ESS AudioDrive ES-1688 and ES-688 sound cards.
  426. port - port # for ES-1688 chip (0x220,0x240,0x260)
  427. mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
  428. irq - IRQ # for ES-1688 chip (5,7,9,10)
  429. mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
  430. dma8 - DMA # for ES-1688 chip (0,1,3)
  431. This module supports multiple cards and autoprobe (without MPU-401 port).
  432. Module snd-es18xx
  433. -----------------
  434. Module for ESS AudioDrive ES-18xx sound cards.
  435. port - port # for ES-18xx chip (0x220,0x240,0x260)
  436. mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
  437. fm_port - port # for FM (optional, not used)
  438. irq - IRQ # for ES-18xx chip (5,7,9,10)
  439. dma1 - first DMA # for ES-18xx chip (0,1,3)
  440. dma2 - first DMA # for ES-18xx chip (0,1,3)
  441. isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
  442. This module supports multiple cards, ISA PnP and autoprobe (without MPU-401
  443. port if native ISA PnP routines are not used).
  444. When dma2 is equal with dma1, the driver works as half-duplex.
  445. The power-management is supported.
  446. Module snd-es1938
  447. -----------------
  448. Module for sound cards based on ESS Solo-1 (ES1938,ES1946) chips.
  449. This module supports multiple cards and autoprobe.
  450. The power-management is supported.
  451. Module snd-es1968
  452. -----------------
  453. Module for sound cards based on ESS Maestro-1/2/2E (ES1968/ES1978) chips.
  454. total_bufsize - total buffer size in kB (1-4096kB)
  455. pcm_substreams_p - playback channels (1-8, default=2)
  456. pcm_substreams_c - capture channels (1-8, default=0)
  457. clock - clock (0 = auto-detection)
  458. use_pm - support the power-management (0 = off, 1 = on,
  459. 2 = auto (default))
  460. enable_mpu - enable MPU401 (0 = off, 1 = on, 2 = auto (default))
  461. joystick - enable joystick (default off)
  462. This module supports multiple cards and autoprobe.
  463. The power-management is supported.
  464. Module snd-fm801
  465. ----------------
  466. Module for ForteMedia FM801 based PCI sound cards.
  467. tea575x_tuner - Enable TEA575x tuner
  468. - 1 = MediaForte 256-PCS
  469. - 2 = MediaForte 256-PCPR
  470. - 3 = MediaForte 64-PCR
  471. - High 16-bits are video (radio) device number + 1
  472. - example: 0x10002 (MediaForte 256-PCPR, device 1)
  473. This module supports multiple cards and autoprobe.
  474. The power-management is supported.
  475. Module snd-gina20
  476. -----------------
  477. Module for Echoaudio Gina20
  478. This module supports multiple cards.
  479. The driver requires the firmware loader support on kernel.
  480. Module snd-gina24
  481. -----------------
  482. Module for Echoaudio Gina24
  483. This module supports multiple cards.
  484. The driver requires the firmware loader support on kernel.
  485. Module snd-gusclassic
  486. ---------------------
  487. Module for Gravis UltraSound Classic sound card.
  488. port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
  489. irq - IRQ # for GF1 chip (3,5,9,11,12,15)
  490. dma1 - DMA # for GF1 chip (1,3,5,6,7)
  491. dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
  492. joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
  493. voices - GF1 voices limit (14-32)
  494. pcm_voices - reserved PCM voices
  495. This module supports multiple cards and autoprobe.
  496. Module snd-gusextreme
  497. ---------------------
  498. Module for Gravis UltraSound Extreme (Synergy ViperMax) sound card.
  499. port - port # for ES-1688 chip (0x220,0x230,0x240,0x250,0x260)
  500. gf1_port - port # for GF1 chip (0x210,0x220,0x230,0x240,0x250,0x260,0x270)
  501. mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable
  502. irq - IRQ # for ES-1688 chip (5,7,9,10)
  503. gf1_irq - IRQ # for GF1 chip (3,5,9,11,12,15)
  504. mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
  505. dma8 - DMA # for ES-1688 chip (0,1,3)
  506. dma1 - DMA # for GF1 chip (1,3,5,6,7)
  507. joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
  508. voices - GF1 voices limit (14-32)
  509. pcm_voices - reserved PCM voices
  510. This module supports multiple cards and autoprobe (without MPU-401 port).
  511. Module snd-gusmax
  512. -----------------
  513. Module for Gravis UltraSound MAX sound card.
  514. port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
  515. irq - IRQ # for GF1 chip (3,5,9,11,12,15)
  516. dma1 - DMA # for GF1 chip (1,3,5,6,7)
  517. dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
  518. joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
  519. voices - GF1 voices limit (14-32)
  520. pcm_voices - reserved PCM voices
  521. This module supports multiple cards and autoprobe.
  522. Module snd-hda-intel
  523. --------------------
  524. Module for Intel HD Audio (ICH6, ICH6M, ESB2, ICH7, ICH8),
  525. ATI SB450, SB600, RS600,
  526. VIA VT8251/VT8237A,
  527. SIS966, ULI M5461
  528. model - force the model name
  529. position_fix - Fix DMA pointer (0 = auto, 1 = none, 2 = POSBUF, 3 = FIFO size)
  530. single_cmd - Use single immediate commands to communicate with
  531. codecs (for debugging only)
  532. disable_msi - Disable Message Signaled Interrupt (MSI)
  533. This module supports one card and autoprobe.
  534. Each codec may have a model table for different configurations.
  535. If your machine isn't listed there, the default (usually minimal)
  536. configuration is set up. You can pass "model=<name>" option to
  537. specify a certain model in such a case. There are different
  538. models depending on the codec chip.
  539. Model name Description
  540. ---------- -----------
  541. ALC880
  542. 3stack 3-jack in back and a headphone out
  543. 3stack-digout 3-jack in back, a HP out and a SPDIF out
  544. 5stack 5-jack in back, 2-jack in front
  545. 5stack-digout 5-jack in back, 2-jack in front, a SPDIF out
  546. 6stack 6-jack in back, 2-jack in front
  547. 6stack-digout 6-jack with a SPDIF out
  548. w810 3-jack
  549. z71v 3-jack (HP shared SPDIF)
  550. asus 3-jack (ASUS Mobo)
  551. asus-w1v ASUS W1V
  552. asus-dig ASUS with SPDIF out
  553. asus-dig2 ASUS with SPDIF out (using GPIO2)
  554. uniwill 3-jack
  555. F1734 2-jack
  556. lg LG laptop (m1 express dual)
  557. lg-lw LG LW20/LW25 laptop
  558. tcl TCL S700
  559. clevo Clevo laptops (m520G, m665n)
  560. test for testing/debugging purpose, almost all controls can be
  561. adjusted. Appearing only when compiled with
  562. $CONFIG_SND_DEBUG=y
  563. auto auto-config reading BIOS (default)
  564. ALC260
  565. hp HP machines
  566. hp-3013 HP machines (3013-variant)
  567. fujitsu Fujitsu S7020
  568. acer Acer TravelMate
  569. basic fixed pin assignment (old default model)
  570. auto auto-config reading BIOS (default)
  571. ALC262
  572. fujitsu Fujitsu Laptop
  573. hp-bpc HP xw4400/6400/8400/9400 laptops
  574. benq Benq ED8
  575. basic fixed pin assignment w/o SPDIF
  576. auto auto-config reading BIOS (default)
  577. ALC882/885
  578. 3stack-dig 3-jack with SPDIF I/O
  579. 6stck-dig 6-jack digital with SPDIF I/O
  580. arima Arima W820Di1
  581. auto auto-config reading BIOS (default)
  582. ALC883/888
  583. 3stack-dig 3-jack with SPDIF I/O
  584. 6stack-dig 6-jack digital with SPDIF I/O
  585. 3stack-6ch 3-jack 6-channel
  586. 3stack-6ch-dig 3-jack 6-channel with SPDIF I/O
  587. 6stack-dig-demo 6-jack digital for Intel demo board
  588. acer Acer laptops (Travelmate 3012WTMi, Aspire 5600, etc)
  589. auto auto-config reading BIOS (default)
  590. ALC861/660
  591. 3stack 3-jack
  592. 3stack-dig 3-jack with SPDIF I/O
  593. 6stack-dig 6-jack with SPDIF I/O
  594. 3stack-660 3-jack (for ALC660)
  595. uniwill-m31 Uniwill M31 laptop
  596. auto auto-config reading BIOS (default)
  597. CMI9880
  598. minimal 3-jack in back
  599. min_fp 3-jack in back, 2-jack in front
  600. full 6-jack in back, 2-jack in front
  601. full_dig 6-jack in back, 2-jack in front, SPDIF I/O
  602. allout 5-jack in back, 2-jack in front, SPDIF out
  603. auto auto-config reading BIOS (default)
  604. AD1981
  605. basic 3-jack (default)
  606. hp HP nx6320
  607. thinkpad Lenovo Thinkpad T60/X60/Z60
  608. AD1986A
  609. 6stack 6-jack, separate surrounds (default)
  610. 3stack 3-stack, shared surrounds
  611. laptop 2-channel only (FSC V2060, Samsung M50)
  612. laptop-eapd 2-channel with EAPD (Samsung R65, ASUS A6J)
  613. AD1988
  614. 6stack 6-jack
  615. 6stack-dig ditto with SPDIF
  616. 3stack 3-jack
  617. 3stack-dig ditto with SPDIF
  618. laptop 3-jack with hp-jack automute
  619. laptop-dig ditto with SPDIF
  620. auto auto-config reading BIOS (default)
  621. STAC9200/9205/9220/9221/9254
  622. ref Reference board
  623. 3stack D945 3stack
  624. 5stack D945 5stack + SPDIF
  625. STAC9227/9228/9229/927x
  626. ref Reference board
  627. 3stack D965 3stack
  628. 5stack D965 5stack + SPDIF
  629. STAC9872
  630. vaio Setup for VAIO FE550G/SZ110
  631. vaio-ar Setup for VAIO AR
  632. If the default configuration doesn't work and one of the above
  633. matches with your device, report it together with the PCI
  634. subsystem ID (output of "lspci -nv") to ALSA BTS or alsa-devel
  635. ML (see the section "Links and Addresses").
  636. Note 2: If you get click noises on output, try the module option
  637. position_fix=1 or 2. position_fix=1 will use the SD_LPIB
  638. register value without FIFO size correction as the current
  639. DMA pointer. position_fix=2 will make the driver to use
  640. the position buffer instead of reading SD_LPIB register.
  641. (Usually SD_LPLIB register is more accurate than the
  642. position buffer.)
  643. NB: If you get many "azx_get_response timeout" messages at
  644. loading, it's likely a problem of interrupts (e.g. ACPI irq
  645. routing). Try to boot with options like "pci=noacpi". Also, you
  646. can try "single_cmd=1" module option. This will switch the
  647. communication method between HDA controller and codecs to the
  648. single immediate commands instead of CORB/RIRB. Basically, the
  649. single command mode is provided only for BIOS, and you won't get
  650. unsolicited events, too. But, at least, this works independently
  651. from the irq. Remember this is a last resort, and should be
  652. avoided as much as possible...
  653. The power-management is supported.
  654. Module snd-hdsp
  655. ---------------
  656. Module for RME Hammerfall DSP audio interface(s)
  657. This module supports multiple cards.
  658. Note: The firmware data can be automatically loaded via hotplug
  659. when CONFIG_FW_LOADER is set. Otherwise, you need to load
  660. the firmware via hdsploader utility included in alsa-tools
  661. package.
  662. The firmware data is found in alsa-firmware package.
  663. Note: snd-page-alloc module does the job which snd-hammerfall-mem
  664. module did formerly. It will allocate the buffers in advance
  665. when any HDSP cards are found. To make the buffer
  666. allocation sure, load snd-page-alloc module in the early
  667. stage of boot sequence. See "Early Buffer Allocation"
  668. section.
  669. Module snd-hdspm
  670. ----------------
  671. Module for RME HDSP MADI board.
  672. precise_ptr - Enable precise pointer, or disable.
  673. line_outs_monitor - Send playback streams to analog outs by default.
  674. enable_monitor - Enable Analog Out on Channel 63/64 by default.
  675. See hdspm.txt for details.
  676. Module snd-ice1712
  677. ------------------
  678. Module for Envy24 (ICE1712) based PCI sound cards.
  679. * MidiMan M Audio Delta 1010
  680. * MidiMan M Audio Delta 1010LT
  681. * MidiMan M Audio Delta DiO 2496
  682. * MidiMan M Audio Delta 66
  683. * MidiMan M Audio Delta 44
  684. * MidiMan M Audio Delta 410
  685. * MidiMan M Audio Audiophile 2496
  686. * TerraTec EWS 88MT
  687. * TerraTec EWS 88D
  688. * TerraTec EWX 24/96
  689. * TerraTec DMX 6Fire
  690. * TerraTec Phase 88
  691. * Hoontech SoundTrack DSP 24
  692. * Hoontech SoundTrack DSP 24 Value
  693. * Hoontech SoundTrack DSP 24 Media 7.1
  694. * Event Electronics, EZ8
  695. * Digigram VX442
  696. * Lionstracs, Mediastaton
  697. model - Use the given board model, one of the following:
  698. delta1010, dio2496, delta66, delta44, audiophile, delta410,
  699. delta1010lt, vx442, ewx2496, ews88mt, ews88mt_new, ews88d,
  700. dmx6fire, dsp24, dsp24_value, dsp24_71, ez8,
  701. phase88, mediastation
  702. omni - Omni I/O support for MidiMan M-Audio Delta44/66
  703. cs8427_timeout - reset timeout for the CS8427 chip (S/PDIF transciever)
  704. in msec resolution, default value is 500 (0.5 sec)
  705. This module supports multiple cards and autoprobe. Note: The consumer part
  706. is not used with all Envy24 based cards (for example in the MidiMan Delta
  707. serie).
  708. Note: The supported board is detected by reading EEPROM or PCI
  709. SSID (if EEPROM isn't available). You can override the
  710. model by passing "model" module option in case that the
  711. driver isn't configured properly or you want to try another
  712. type for testing.
  713. Module snd-ice1724
  714. ------------------
  715. Module for Envy24HT (VT/ICE1724), Envy24PT (VT1720) based PCI sound cards.
  716. * MidiMan M Audio Revolution 5.1
  717. * MidiMan M Audio Revolution 7.1
  718. * AMP Ltd AUDIO2000
  719. * TerraTec Aureon 5.1 Sky
  720. * TerraTec Aureon 7.1 Space
  721. * TerraTec Aureon 7.1 Universe
  722. * TerraTec Phase 22
  723. * TerraTec Phase 28
  724. * AudioTrak Prodigy 7.1
  725. * AudioTrak Prodigy 7.1LT
  726. * AudioTrak Prodigy 192
  727. * Pontis MS300
  728. * Albatron K8X800 Pro II
  729. * Chaintech ZNF3-150
  730. * Chaintech ZNF3-250
  731. * Chaintech 9CJS
  732. * Chaintech AV-710
  733. * Shuttle SN25P
  734. model - Use the given board model, one of the following:
  735. revo51, revo71, amp2000, prodigy71, prodigy71lt,
  736. prodigy192, aureon51, aureon71, universe,
  737. k8x800, phase22, phase28, ms300, av710
  738. This module supports multiple cards and autoprobe.
  739. Note: The supported board is detected by reading EEPROM or PCI
  740. SSID (if EEPROM isn't available). You can override the
  741. model by passing "model" module option in case that the
  742. driver isn't configured properly or you want to try another
  743. type for testing.
  744. Module snd-indigo
  745. -----------------
  746. Module for Echoaudio Indigo
  747. This module supports multiple cards.
  748. The driver requires the firmware loader support on kernel.
  749. Module snd-indigodj
  750. -------------------
  751. Module for Echoaudio Indigo DJ
  752. This module supports multiple cards.
  753. The driver requires the firmware loader support on kernel.
  754. Module snd-indigoio
  755. -------------------
  756. Module for Echoaudio Indigo IO
  757. This module supports multiple cards.
  758. The driver requires the firmware loader support on kernel.
  759. Module snd-intel8x0
  760. -------------------
  761. Module for AC'97 motherboards from Intel and compatibles.
  762. * Intel i810/810E, i815, i820, i830, i84x, MX440
  763. ICH5, ICH6, ICH7, ESB2
  764. * SiS 7012 (SiS 735)
  765. * NVidia NForce, NForce2, NForce3, MCP04, CK804
  766. CK8, CK8S, MCP501
  767. * AMD AMD768, AMD8111
  768. * ALi m5455
  769. ac97_clock - AC'97 codec clock base (0 = auto-detect)
  770. ac97_quirk - AC'97 workaround for strange hardware
  771. See "AC97 Quirk Option" section below.
  772. buggy_irq - Enable workaround for buggy interrupts on some
  773. motherboards (default yes on nForce chips,
  774. otherwise off)
  775. buggy_semaphore - Enable workaround for hardwares with buggy
  776. semaphores (e.g. on some ASUS laptops)
  777. (default off)
  778. This module supports one chip and autoprobe.
  779. Note: the latest driver supports auto-detection of chip clock.
  780. if you still encounter too fast playback, specify the clock
  781. explicitly via the module option "ac97_clock=41194".
  782. Joystick/MIDI ports are not supported by this driver. If your
  783. motherboard has these devices, use the ns558 or snd-mpu401
  784. modules, respectively.
  785. The power-management is supported.
  786. Module snd-intel8x0m
  787. --------------------
  788. Module for Intel ICH (i8x0) chipset MC97 modems.
  789. * Intel i810/810E, i815, i820, i830, i84x, MX440
  790. ICH5, ICH6, ICH7
  791. * SiS 7013 (SiS 735)
  792. * NVidia NForce, NForce2, NForce2s, NForce3
  793. * AMD AMD8111
  794. * ALi m5455
  795. ac97_clock - AC'97 codec clock base (0 = auto-detect)
  796. This module supports one card and autoprobe.
  797. Note: The default index value of this module is -2, i.e. the first
  798. slot is excluded.
  799. The power-management is supported.
  800. Module snd-interwave
  801. --------------------
  802. Module for Gravis UltraSound PnP, Dynasonic 3-D/Pro, STB Sound Rage 32
  803. and other sound cards based on AMD InterWave (tm) chip.
  804. port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
  805. irq - IRQ # for InterWave chip (3,5,9,11,12,15)
  806. dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
  807. dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
  808. joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
  809. midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
  810. pcm_voices - reserved PCM voices for the synthesizer (default 2)
  811. effect - 1 = InterWave effects enable (default 0);
  812. requires 8 voices
  813. This module supports multiple cards, autoprobe and ISA PnP.
  814. Module snd-interwave-stb
  815. ------------------------
  816. Module for UltraSound 32-Pro (sound card from STB used by Compaq)
  817. and other sound cards based on AMD InterWave (tm) chip with TEA6330T
  818. circuit for extended control of bass, treble and master volume.
  819. port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
  820. port_tc - tone control (i2c bus) port # for TEA6330T chip (0x350,0x360,0x370,0x380)
  821. irq - IRQ # for InterWave chip (3,5,9,11,12,15)
  822. dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
  823. dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
  824. joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
  825. midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
  826. pcm_voices - reserved PCM voices for the synthesizer (default 2)
  827. effect - 1 = InterWave effects enable (default 0);
  828. requires 8 voices
  829. This module supports multiple cards, autoprobe and ISA PnP.
  830. Module snd-korg1212
  831. -------------------
  832. Module for Korg 1212 IO PCI card
  833. This module supports multiple cards.
  834. Module snd-layla20
  835. ------------------
  836. Module for Echoaudio Layla20
  837. This module supports multiple cards.
  838. The driver requires the firmware loader support on kernel.
  839. Module snd-layla24
  840. ------------------
  841. Module for Echoaudio Layla24
  842. This module supports multiple cards.
  843. The driver requires the firmware loader support on kernel.
  844. Module snd-maestro3
  845. -------------------
  846. Module for Allegro/Maestro3 chips
  847. external_amp - enable external amp (enabled by default)
  848. amp_gpio - GPIO pin number for external amp (0-15) or
  849. -1 for default pin (8 for allegro, 1 for
  850. others)
  851. This module supports autoprobe and multiple chips.
  852. Note: the binding of amplifier is dependent on hardware.
  853. If there is no sound even though all channels are unmuted, try to
  854. specify other gpio connection via amp_gpio option.
  855. For example, a Panasonic notebook might need "amp_gpio=0x0d"
  856. option.
  857. The power-management is supported.
  858. Module snd-mia
  859. ---------------
  860. Module for Echoaudio Mia
  861. This module supports multiple cards.
  862. The driver requires the firmware loader support on kernel.
  863. Module snd-miro
  864. ---------------
  865. Module for Miro soundcards: miroSOUND PCM 1 pro,
  866. miroSOUND PCM 12,
  867. miroSOUND PCM 20 Radio.
  868. port - Port # (0x530,0x604,0xe80,0xf40)
  869. irq - IRQ # (5,7,9,10,11)
  870. dma1 - 1st dma # (0,1,3)
  871. dma2 - 2nd dma # (0,1)
  872. mpu_port - MPU-401 port # (0x300,0x310,0x320,0x330)
  873. mpu_irq - MPU-401 irq # (5,7,9,10)
  874. fm_port - FM Port # (0x388)
  875. wss - enable WSS mode
  876. ide - enable onboard ide support
  877. Module snd-mixart
  878. -----------------
  879. Module for Digigram miXart8 sound cards.
  880. This module supports multiple cards.
  881. Note: One miXart8 board will be represented as 4 alsa cards.
  882. See MIXART.txt for details.
  883. When the driver is compiled as a module and the hotplug firmware
  884. is supported, the firmware data is loaded via hotplug automatically.
  885. Install the necessary firmware files in alsa-firmware package.
  886. When no hotplug fw loader is available, you need to load the
  887. firmware via mixartloader utility in alsa-tools package.
  888. Module snd-mona
  889. ---------------
  890. Module for Echoaudio Mona
  891. This module supports multiple cards.
  892. The driver requires the firmware loader support on kernel.
  893. Module snd-mpu401
  894. -----------------
  895. Module for MPU-401 UART devices.
  896. port - port number or -1 (disable)
  897. irq - IRQ number or -1 (disable)
  898. pnp - PnP detection - 0 = disable, 1 = enable (default)
  899. This module supports multiple devices and PnP.
  900. Module snd-mtpav
  901. ----------------
  902. Module for MOTU MidiTimePiece AV multiport MIDI (on the parallel
  903. port).
  904. port - I/O port # for MTPAV (0x378,0x278, default=0x378)
  905. irq - IRQ # for MTPAV (7,5, default=7)
  906. hwports - number of supported hardware ports, default=8.
  907. Module supports only 1 card. This module has no enable option.
  908. Module snd-mts64
  909. ----------------
  910. Module for Ego Systems (ESI) Miditerminal 4140
  911. This module supports multiple devices.
  912. Requires parport (CONFIG_PARPORT).
  913. Module snd-nm256
  914. ----------------
  915. Module for NeoMagic NM256AV/ZX chips
  916. playback_bufsize - max playback frame size in kB (4-128kB)
  917. capture_bufsize - max capture frame size in kB (4-128kB)
  918. force_ac97 - 0 or 1 (disabled by default)
  919. buffer_top - specify buffer top address
  920. use_cache - 0 or 1 (disabled by default)
  921. vaio_hack - alias buffer_top=0x25a800
  922. reset_workaround - enable AC97 RESET workaround for some laptops
  923. reset_workaround2 - enable extended AC97 RESET workaround for some
  924. other laptops
  925. This module supports one chip and autoprobe.
  926. The power-management is supported.
  927. Note: on some notebooks the buffer address cannot be detected
  928. automatically, or causes hang-up during initialization.
  929. In such a case, specify the buffer top address explicity via
  930. buffer_top option.
  931. For example,
  932. Sony F250: buffer_top=0x25a800
  933. Sony F270: buffer_top=0x272800
  934. The driver supports only ac97 codec. It's possible to force
  935. to initialize/use ac97 although it's not detected. In such a
  936. case, use force_ac97=1 option - but *NO* guarantee whether it
  937. works!
  938. Note: The NM256 chip can be linked internally with non-AC97
  939. codecs. This driver supports only the AC97 codec, and won't work
  940. with machines with other (most likely CS423x or OPL3SAx) chips,
  941. even though the device is detected in lspci. In such a case, try
  942. other drivers, e.g. snd-cs4232 or snd-opl3sa2. Some has ISA-PnP
  943. but some doesn't have ISA PnP. You'll need to specify isapnp=0
  944. and proper hardware parameters in the case without ISA PnP.
  945. Note: some laptops need a workaround for AC97 RESET. For the
  946. known hardware like Dell Latitude LS and Sony PCG-F305, this
  947. workaround is enabled automatically. For other laptops with a
  948. hard freeze, you can try reset_workaround=1 option.
  949. Note: Dell Latitude CSx laptops have another problem regarding
  950. AC97 RESET. On these laptops, reset_workaround2 option is
  951. turned on as default. This option is worth to try if the
  952. previous reset_workaround option doesn't help.
  953. Note: This driver is really crappy. It's a porting from the
  954. OSS driver, which is a result of black-magic reverse engineering.
  955. The detection of codec will fail if the driver is loaded *after*
  956. X-server as described above. You might be able to force to load
  957. the module, but it may result in hang-up. Hence, make sure that
  958. you load this module *before* X if you encounter this kind of
  959. problem.
  960. Module snd-opl3sa2
  961. ------------------
  962. Module for Yamaha OPL3-SA2/SA3 sound cards.
  963. port - control port # for OPL3-SA chip (0x370)
  964. sb_port - SB port # for OPL3-SA chip (0x220,0x240)
  965. wss_port - WSS port # for OPL3-SA chip (0x530,0xe80,0xf40,0x604)
  966. midi_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
  967. fm_port - FM port # for OPL3-SA chip (0x388), -1 = disable
  968. irq - IRQ # for OPL3-SA chip (5,7,9,10)
  969. dma1 - first DMA # for Yamaha OPL3-SA chip (0,1,3)
  970. dma2 - second DMA # for Yamaha OPL3-SA chip (0,1,3), -1 = disable
  971. isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
  972. This module supports multiple cards and ISA PnP. It does not support
  973. autoprobe (if ISA PnP is not used) thus all ports must be specified!!!
  974. The power-management is supported.
  975. Module snd-opti92x-ad1848
  976. -------------------------
  977. Module for sound cards based on OPTi 82c92x and Analog Devices AD1848 chips.
  978. Module works with OAK Mozart cards as well.
  979. port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
  980. mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
  981. fm_port - port # for OPL3 device (0x388)
  982. irq - IRQ # for WSS chip (5,7,9,10,11)
  983. mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
  984. dma1 - first DMA # for WSS chip (0,1,3)
  985. This module supports only one card, autoprobe and PnP.
  986. Module snd-opti92x-cs4231
  987. -------------------------
  988. Module for sound cards based on OPTi 82c92x and Crystal CS4231 chips.
  989. port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
  990. mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
  991. fm_port - port # for OPL3 device (0x388)
  992. irq - IRQ # for WSS chip (5,7,9,10,11)
  993. mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
  994. dma1 - first DMA # for WSS chip (0,1,3)
  995. dma2 - second DMA # for WSS chip (0,1,3)
  996. This module supports only one card, autoprobe and PnP.
  997. Module snd-opti93x
  998. ------------------
  999. Module for sound cards based on OPTi 82c93x chips.
  1000. port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
  1001. mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
  1002. fm_port - port # for OPL3 device (0x388)
  1003. irq - IRQ # for WSS chip (5,7,9,10,11)
  1004. mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
  1005. dma1 - first DMA # for WSS chip (0,1,3)
  1006. dma2 - second DMA # for WSS chip (0,1,3)
  1007. This module supports only one card, autoprobe and PnP.
  1008. Module snd-pcxhr
  1009. ----------------
  1010. Module for Digigram PCXHR boards
  1011. This module supports multiple cards.
  1012. Module snd-powermac (on ppc only)
  1013. ---------------------------------
  1014. Module for PowerMac, iMac and iBook on-board soundchips
  1015. enable_beep - enable beep using PCM (enabled as default)
  1016. Module supports autoprobe a chip.
  1017. Note: the driver may have problems regarding endianess.
  1018. The power-management is supported.
  1019. Module snd-pxa2xx-ac97 (on arm only)
  1020. ------------------------------------
  1021. Module for AC97 driver for the Intel PXA2xx chip
  1022. For ARM architecture only.
  1023. The power-management is supported.
  1024. Module snd-riptide
  1025. ------------------
  1026. Module for Conexant Riptide chip
  1027. joystick_port - Joystick port # (default: 0x200)
  1028. mpu_port - MPU401 port # (default: 0x330)
  1029. opl3_port - OPL3 port # (default: 0x388)
  1030. This module supports multiple cards.
  1031. The driver requires the firmware loader support on kernel.
  1032. You need to install the firmware file "riptide.hex" to the standard
  1033. firmware path (e.g. /lib/firmware).
  1034. Module snd-rme32
  1035. ----------------
  1036. Module for RME Digi32, Digi32 Pro and Digi32/8 (Sek'd Prodif32,
  1037. Prodif96 and Prodif Gold) sound cards.
  1038. This module supports multiple cards.
  1039. Module snd-rme96
  1040. ----------------
  1041. Module for RME Digi96, Digi96/8 and Digi96/8 PRO/PAD/PST sound cards.
  1042. This module supports multiple cards.
  1043. Module snd-rme9652
  1044. ------------------
  1045. Module for RME Digi9652 (Hammerfall, Hammerfall-Light) sound cards.
  1046. precise_ptr - Enable precise pointer (doesn't work reliably).
  1047. (default = 0)
  1048. This module supports multiple cards.
  1049. Note: snd-page-alloc module does the job which snd-hammerfall-mem
  1050. module did formerly. It will allocate the buffers in advance
  1051. when any RME9652 cards are found. To make the buffer
  1052. allocation sure, load snd-page-alloc module in the early
  1053. stage of boot sequence. See "Early Buffer Allocation"
  1054. section.
  1055. Module snd-sa11xx-uda1341 (on arm only)
  1056. ---------------------------------------
  1057. Module for Philips UDA1341TS on Compaq iPAQ H3600 sound card.
  1058. Module supports only one card.
  1059. Module has no enable and index options.
  1060. The power-management is supported.
  1061. Module snd-sb8
  1062. --------------
  1063. Module for 8-bit SoundBlaster cards: SoundBlaster 1.0,
  1064. SoundBlaster 2.0,
  1065. SoundBlaster Pro
  1066. port - port # for SB DSP chip (0x220,0x240,0x260)
  1067. irq - IRQ # for SB DSP chip (5,7,9,10)
  1068. dma8 - DMA # for SB DSP chip (1,3)
  1069. This module supports multiple cards and autoprobe.
  1070. The power-management is supported.
  1071. Module snd-sb16 and snd-sbawe
  1072. -----------------------------
  1073. Module for 16-bit SoundBlaster cards: SoundBlaster 16 (PnP),
  1074. SoundBlaster AWE 32 (PnP),
  1075. SoundBlaster AWE 64 PnP
  1076. port - port # for SB DSP 4.x chip (0x220,0x240,0x260)
  1077. mpu_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
  1078. awe_port - base port # for EMU8000 synthesizer (0x620,0x640,0x660)
  1079. (snd-sbawe module only)
  1080. irq - IRQ # for SB DSP 4.x chip (5,7,9,10)
  1081. dma8 - 8-bit DMA # for SB DSP 4.x chip (0,1,3)
  1082. dma16 - 16-bit DMA # for SB DSP 4.x chip (5,6,7)
  1083. mic_agc - Mic Auto-Gain-Control - 0 = disable, 1 = enable (default)
  1084. csp - ASP/CSP chip support - 0 = disable (default), 1 = enable
  1085. isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
  1086. This module supports multiple cards, autoprobe and ISA PnP.
  1087. Note: To use Vibra16X cards in 16-bit half duplex mode, you must
  1088. disable 16bit DMA with dma16 = -1 module parameter.
  1089. Also, all Sound Blaster 16 type cards can operate in 16-bit
  1090. half duplex mode through 8-bit DMA channel by disabling their
  1091. 16-bit DMA channel.
  1092. The power-management is supported.
  1093. Module snd-sgalaxy
  1094. ------------------
  1095. Module for Aztech Sound Galaxy sound card.
  1096. sbport - Port # for SB16 interface (0x220,0x240)
  1097. wssport - Port # for WSS interface (0x530,0xe80,0xf40,0x604)
  1098. irq - IRQ # (7,9,10,11)
  1099. dma1 - DMA #
  1100. This module supports multiple cards.
  1101. The power-management is supported.
  1102. Module snd-sscape
  1103. -----------------
  1104. Module for ENSONIQ SoundScape PnP cards.
  1105. port - Port # (PnP setup)
  1106. irq - IRQ # (PnP setup)
  1107. mpu_irq - MPU-401 IRQ # (PnP setup)
  1108. dma - DMA # (PnP setup)
  1109. This module supports multiple cards. ISA PnP must be enabled.
  1110. You need sscape_ctl tool in alsa-tools package for loading
  1111. the microcode.
  1112. Module snd-sun-amd7930 (on sparc only)
  1113. --------------------------------------
  1114. Module for AMD7930 sound chips found on Sparcs.
  1115. This module supports multiple cards.
  1116. Module snd-sun-cs4231 (on sparc only)
  1117. -------------------------------------
  1118. Module for CS4231 sound chips found on Sparcs.
  1119. This module supports multiple cards.
  1120. Module snd-sun-dbri (on sparc only)
  1121. -----------------------------------
  1122. Module for DBRI sound chips found on Sparcs.
  1123. This module supports multiple cards.
  1124. Module snd-wavefront
  1125. --------------------
  1126. Module for Turtle Beach Maui, Tropez and Tropez+ sound cards.
  1127. cs4232_pcm_port - Port # for CS4232 PCM interface.
  1128. cs4232_pcm_irq - IRQ # for CS4232 PCM interface (5,7,9,11,12,15).
  1129. cs4232_mpu_port - Port # for CS4232 MPU-401 interface.
  1130. cs4232_mpu_irq - IRQ # for CS4232 MPU-401 interface (9,11,12,15).
  1131. use_cs4232_midi - Use CS4232 MPU-401 interface
  1132. (inaccessibly located inside your computer)
  1133. ics2115_port - Port # for ICS2115
  1134. ics2115_irq - IRQ # for ICS2115
  1135. fm_port - FM OPL-3 Port #
  1136. dma1 - DMA1 # for CS4232 PCM interface.
  1137. dma2 - DMA2 # for CS4232 PCM interface.
  1138. isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
  1139. This module supports multiple cards and ISA PnP.
  1140. Module snd-sonicvibes
  1141. ---------------------
  1142. Module for S3 SonicVibes PCI sound cards.
  1143. * PINE Schubert 32 PCI
  1144. reverb - Reverb Enable - 1 = enable, 0 = disable (default)
  1145. - SoundCard must have onboard SRAM for this.
  1146. mge - Mic Gain Enable - 1 = enable, 0 = disable (default)
  1147. This module supports multiple cards and autoprobe.
  1148. Module snd-serial-u16550
  1149. ------------------------
  1150. Module for UART16550A serial MIDI ports.
  1151. port - port # for UART16550A chip
  1152. irq - IRQ # for UART16550A chip, -1 = poll mode
  1153. speed - speed in bauds (9600,19200,38400,57600,115200)
  1154. 38400 = default
  1155. base - base for divisor in bauds (57600,115200,230400,460800)
  1156. 115200 = default
  1157. outs - number of MIDI ports in a serial port (1-4)
  1158. 1 = default
  1159. adaptor - Type of adaptor.
  1160. 0 = Soundcanvas, 1 = MS-124T, 2 = MS-124W S/A,
  1161. 3 = MS-124W M/B, 4 = Generic
  1162. This module supports multiple cards. This module does not support autoprobe
  1163. thus the main port must be specified!!! Other options are optional.
  1164. Module snd-trident
  1165. ------------------
  1166. Module for Trident 4DWave DX/NX sound cards.
  1167. * Best Union Miss Melody 4DWave PCI
  1168. * HIS 4DWave PCI
  1169. * Warpspeed ONSpeed 4DWave PCI
  1170. * AzTech PCI 64-Q3D
  1171. * Addonics SV 750
  1172. * CHIC True Sound 4Dwave
  1173. * Shark Predator4D-PCI
  1174. * Jaton SonicWave 4D
  1175. pcm_channels - max channels (voices) reserved for PCM
  1176. wavetable_size - max wavetable size in kB (4-?kb)
  1177. This module supports multiple cards and autoprobe.
  1178. The power-management is supported.
  1179. Module snd-usb-audio
  1180. --------------------
  1181. Module for USB audio and USB MIDI devices.
  1182. vid - Vendor ID for the device (optional)
  1183. pid - Product ID for the device (optional)
  1184. device_setup - Device specific magic number (optional)
  1185. - Influence depends on the device
  1186. - Default: 0x0000
  1187. This module supports multiple devices, autoprobe and hotplugging.
  1188. Module snd-usb-usx2y
  1189. --------------------
  1190. Module for Tascam USB US-122, US-224 and US-428 devices.
  1191. This module supports multiple devices, autoprobe and hotplugging.
  1192. Note: you need to load the firmware via usx2yloader utility included
  1193. in alsa-tools and alsa-firmware packages.
  1194. Module snd-via82xx
  1195. ------------------
  1196. Module for AC'97 motherboards based on VIA 82C686A/686B, 8233,
  1197. 8233A, 8233C, 8235, 8237 (south) bridge.
  1198. mpu_port - 0x300,0x310,0x320,0x330, otherwise obtain BIOS setup
  1199. [VIA686A/686B only]
  1200. joystick - Enable joystick (default off) [VIA686A/686B only]
  1201. ac97_clock - AC'97 codec clock base (default 48000Hz)
  1202. dxs_support - support DXS channels,
  1203. 0 = auto (default), 1 = enable, 2 = disable,
  1204. 3 = 48k only, 4 = no VRA, 5 = enable any sample
  1205. rate and different sample rates on different
  1206. channels
  1207. [VIA8233/C, 8235, 8237 only]
  1208. ac97_quirk - AC'97 workaround for strange hardware
  1209. See "AC97 Quirk Option" section below.
  1210. This module supports one chip and autoprobe.
  1211. Note: on some SMP motherboards like MSI 694D the interrupts might
  1212. not be generated properly. In such a case, please try to
  1213. set the SMP (or MPS) version on BIOS to 1.1 instead of
  1214. default value 1.4. Then the interrupt number will be
  1215. assigned under 15. You might also upgrade your BIOS.
  1216. Note: VIA8233/5/7 (not VIA8233A) can support DXS (direct sound)
  1217. channels as the first PCM. On these channels, up to 4
  1218. streams can be played at the same time, and the controller
  1219. can perform sample rate conversion with separate rates for
  1220. each channel.
  1221. As default (dxs_support = 0), 48k fixed rate is chosen
  1222. except for the known devices since the output is often
  1223. noisy except for 48k on some mother boards due to the
  1224. bug of BIOS.
  1225. Please try once dxs_support=5 and if it works on other
  1226. sample rates (e.g. 44.1kHz of mp3 playback), please let us
  1227. know the PCI subsystem vendor/device id's (output of
  1228. "lspci -nv").
  1229. If dxs_support=5 does not work, try dxs_support=4; if it
  1230. doesn't work too, try dxs_support=1. (dxs_support=1 is
  1231. usually for old motherboards. The correct implemented
  1232. board should work with 4 or 5.) If it still doesn't
  1233. work and the default setting is ok, dxs_support=3 is the
  1234. right choice. If the default setting doesn't work at all,
  1235. try dxs_support=2 to disable the DXS channels.
  1236. In any cases, please let us know the result and the
  1237. subsystem vendor/device ids. See "Links and Addresses"
  1238. below.
  1239. Note: for the MPU401 on VIA823x, use snd-mpu401 driver
  1240. additionally. The mpu_port option is for VIA686 chips only.
  1241. The power-management is supported.
  1242. Module snd-via82xx-modem
  1243. ------------------------
  1244. Module for VIA82xx AC97 modem
  1245. ac97_clock - AC'97 codec clock base (default 48000Hz)
  1246. This module supports one card and autoprobe.
  1247. Note: The default index value of this module is -2, i.e. the first
  1248. slot is excluded.
  1249. The power-management is supported.
  1250. Module snd-virmidi
  1251. ------------------
  1252. Module for virtual rawmidi devices.
  1253. This module creates virtual rawmidi devices which communicate
  1254. to the corresponding ALSA sequencer ports.
  1255. midi_devs - MIDI devices # (1-4, default=4)
  1256. This module supports multiple cards.
  1257. Module snd-vx222
  1258. ----------------
  1259. Module for Digigram VX-Pocket VX222, V222 v2 and Mic cards.
  1260. mic - Enable Microphone on V222 Mic (NYI)
  1261. ibl - Capture IBL size. (default = 0, minimum size)
  1262. This module supports multiple cards.
  1263. When the driver is compiled as a module and the hotplug firmware
  1264. is supported, the firmware data is loaded via hotplug automatically.
  1265. Install the necessary firmware files in alsa-firmware package.
  1266. When no hotplug fw loader is available, you need to load the
  1267. firmware via vxloader utility in alsa-tools package. To invoke
  1268. vxloader automatically, add the following to /etc/modprobe.conf
  1269. install snd-vx222 /sbin/modprobe --first-time -i snd-vx222 && /usr/bin/vxloader
  1270. (for 2.2/2.4 kernels, add "post-install /usr/bin/vxloader" to
  1271. /etc/modules.conf, instead.)
  1272. IBL size defines the interrupts period for PCM. The smaller size
  1273. gives smaller latency but leads to more CPU consumption, too.
  1274. The size is usually aligned to 126. As default (=0), the smallest
  1275. size is chosen. The possible IBL values can be found in
  1276. /proc/asound/cardX/vx-status proc file.
  1277. The power-management is supported.
  1278. Module snd-vxpocket
  1279. -------------------
  1280. Module for Digigram VX-Pocket VX2 and 440 PCMCIA cards.
  1281. ibl - Capture IBL size. (default = 0, minimum size)
  1282. This module supports multiple cards. The module is compiled only when
  1283. PCMCIA is supported on kernel.
  1284. With the older 2.6.x kernel, to activate the driver via the card
  1285. manager, you'll need to set up /etc/pcmcia/vxpocket.conf. See the
  1286. sound/pcmcia/vx/vxpocket.c. 2.6.13 or later kernel requires no
  1287. longer require a config file.
  1288. When the driver is compiled as a module and the hotplug firmware
  1289. is supported, the firmware data is loaded via hotplug automatically.
  1290. Install the necessary firmware files in alsa-firmware package.
  1291. When no hotplug fw loader is available, you need to load the
  1292. firmware via vxloader utility in alsa-tools package.
  1293. About capture IBL, see the description of snd-vx222 module.
  1294. Note: snd-vxp440 driver is merged to snd-vxpocket driver since
  1295. ALSA 1.0.10.
  1296. The power-management is supported.
  1297. Module snd-ymfpci
  1298. -----------------
  1299. Module for Yamaha PCI chips (YMF72x, YMF74x & YMF75x).
  1300. mpu_port - 0x300,0x330,0x332,0x334, 0 (disable) by default,
  1301. 1 (auto-detect for YMF744/754 only)
  1302. fm_port - 0x388,0x398,0x3a0,0x3a8, 0 (disable) by default
  1303. 1 (auto-detect for YMF744/754 only)
  1304. joystick_port - 0x201,0x202,0x204,0x205, 0 (disable) by default,
  1305. 1 (auto-detect)
  1306. rear_switch - enable shared rear/line-in switch (bool)
  1307. This module supports autoprobe and multiple chips.
  1308. The power-management is supported.
  1309. Module snd-pdaudiocf
  1310. --------------------
  1311. Module for Sound Core PDAudioCF sound card.
  1312. The power-management is supported.
  1313. AC97 Quirk Option
  1314. =================
  1315. The ac97_quirk option is used to enable/override the workaround for
  1316. specific devices on drivers for on-board AC'97 controllers like
  1317. snd-intel8x0. Some hardware have swapped output pins between Master
  1318. and Headphone, or Surround (thanks to confusion of AC'97
  1319. specifications from version to version :-)
  1320. The driver provides the auto-detection of known problematic devices,
  1321. but some might be unknown or wrongly detected. In such a case, pass
  1322. the proper value with this option.
  1323. The following strings are accepted:
  1324. - default Don't override the default setting
  1325. - none Disable the quirk
  1326. - hp_only Bind Master and Headphone controls as a single control
  1327. - swap_hp Swap headphone and master controls
  1328. - swap_surround Swap master and surround controls
  1329. - ad_sharing For AD1985, turn on OMS bit and use headphone
  1330. - alc_jack For ALC65x, turn on the jack sense mode
  1331. - inv_eapd Inverted EAPD implementation
  1332. - mute_led Bind EAPD bit for turning on/off mute LED
  1333. For backward compatibility, the corresponding integer value -1, 0,
  1334. ... are accepted, too.
  1335. For example, if "Master" volume control has no effect on your device
  1336. but only "Headphone" does, pass ac97_quirk=hp_only module option.
  1337. Configuring Non-ISAPNP Cards
  1338. ============================
  1339. When the kernel is configured with ISA-PnP support, the modules
  1340. supporting the isapnp cards will have module options "isapnp".
  1341. If this option is set, *only* the ISA-PnP devices will be probed.
  1342. For probing the non ISA-PnP cards, you have to pass "isapnp=0" option
  1343. together with the proper i/o and irq configuration.
  1344. When the kernel is configured without ISA-PnP support, isapnp option
  1345. will be not built in.
  1346. Module Autoloading Support
  1347. ==========================
  1348. The ALSA drivers can be loaded automatically on demand by defining
  1349. module aliases. The string 'snd-card-%1' is requested for ALSA native
  1350. devices where %i is sound card number from zero to seven.
  1351. To auto-load an ALSA driver for OSS services, define the string
  1352. 'sound-slot-%i' where %i means the slot number for OSS, which
  1353. corresponds to the card index of ALSA. Usually, define this
  1354. as the same card module.
  1355. An example configuration for a single emu10k1 card is like below:
  1356. ----- /etc/modprobe.conf
  1357. alias snd-card-0 snd-emu10k1
  1358. alias sound-slot-0 snd-emu10k1
  1359. ----- /etc/modprobe.conf
  1360. The available number of auto-loaded sound cards depends on the module
  1361. option "cards_limit" of snd module. As default it's set to 1.
  1362. To enable the auto-loading of multiple cards, specify the number of
  1363. sound cards in that option.
  1364. When multiple cards are available, it'd better to specify the index
  1365. number for each card via module option, too, so that the order of
  1366. cards is kept consistent.
  1367. An example configuration for two sound cards is like below:
  1368. ----- /etc/modprobe.conf
  1369. # ALSA portion
  1370. options snd cards_limit=2
  1371. alias snd-card-0 snd-interwave
  1372. alias snd-card-1 snd-ens1371
  1373. options snd-interwave index=0
  1374. options snd-ens1371 index=1
  1375. # OSS/Free portion
  1376. alias sound-slot-0 snd-interwave
  1377. alias sound-slot-1 snd-ens1371
  1378. ----- /etc/moprobe.conf
  1379. In this example, the interwave card is always loaded as the first card
  1380. (index 0) and ens1371 as the second (index 1).
  1381. ALSA PCM devices to OSS devices mapping
  1382. =======================================
  1383. /dev/snd/pcmC0D0[c|p] -> /dev/audio0 (/dev/audio) -> minor 4
  1384. /dev/snd/pcmC0D0[c|p] -> /dev/dsp0 (/dev/dsp) -> minor 3
  1385. /dev/snd/pcmC0D1[c|p] -> /dev/adsp0 (/dev/adsp) -> minor 12
  1386. /dev/snd/pcmC1D0[c|p] -> /dev/audio1 -> minor 4+16 = 20
  1387. /dev/snd/pcmC1D0[c|p] -> /dev/dsp1 -> minor 3+16 = 19
  1388. /dev/snd/pcmC1D1[c|p] -> /dev/adsp1 -> minor 12+16 = 28
  1389. /dev/snd/pcmC2D0[c|p] -> /dev/audio2 -> minor 4+32 = 36
  1390. /dev/snd/pcmC2D0[c|p] -> /dev/dsp2 -> minor 3+32 = 39
  1391. /dev/snd/pcmC2D1[c|p] -> /dev/adsp2 -> minor 12+32 = 44
  1392. The first number from /dev/snd/pcmC{X}D{Y}[c|p] expression means
  1393. sound card number and second means device number. The ALSA devices
  1394. have either 'c' or 'p' suffix indicating the direction, capture and
  1395. playback, respectively.
  1396. Please note that the device mapping above may be varied via the module
  1397. options of snd-pcm-oss module.
  1398. DEVFS support
  1399. =============
  1400. The ALSA driver fully supports the devfs extension.
  1401. You should add lines below to your devfsd.conf file:
  1402. LOOKUP snd MODLOAD ACTION snd
  1403. REGISTER ^sound/.* PERMISSIONS root.audio 660
  1404. REGISTER ^snd/.* PERMISSIONS root.audio 660
  1405. Warning: These lines assume that you have the audio group in your system.
  1406. Otherwise replace audio word with another group name (root for
  1407. example).
  1408. Proc interfaces (/proc/asound)
  1409. ==============================
  1410. /proc/asound/card#/pcm#[cp]/oss
  1411. -------------------------------
  1412. String "erase" - erase all additional informations about OSS applications
  1413. String "<app_name> <fragments> <fragment_size> [<options>]"
  1414. <app_name> - name of application with (higher priority) or without path
  1415. <fragments> - number of fragments or zero if auto
  1416. <fragment_size> - size of fragment in bytes or zero if auto
  1417. <options> - optional parameters
  1418. - disable the application tries to open a pcm device for
  1419. this channel but does not want to use it.
  1420. (Cause a bug or mmap needs)
  1421. It's good for Quake etc...
  1422. - direct don't use plugins
  1423. - block force block mode (rvplayer)
  1424. - non-block force non-block mode
  1425. - whole-frag write only whole fragments (optimization affecting
  1426. playback only)
  1427. - no-silence do not fill silence ahead to avoid clicks
  1428. - buggy-ptr Returns the whitespace blocks in GETOPTR ioctl
  1429. instead of filled blocks
  1430. Example: echo "x11amp 128 16384" > /proc/asound/card0/pcm0p/oss
  1431. echo "squake 0 0 disable" > /proc/asound/card0/pcm0c/oss
  1432. echo "rvplayer 0 0 block" > /proc/asound/card0/pcm0p/oss
  1433. Early Buffer Allocation
  1434. =======================
  1435. Some drivers (e.g. hdsp) require the large contiguous buffers, and
  1436. sometimes it's too late to find such spaces when the driver module is
  1437. actually loaded due to memory fragmentation. You can pre-allocate the
  1438. PCM buffers by loading snd-page-alloc module and write commands to its
  1439. proc file in prior, for example, in the early boot stage like
  1440. /etc/init.d/*.local scripts.
  1441. Reading the proc file /proc/drivers/snd-page-alloc shows the current
  1442. usage of page allocation. In writing, you can send the following
  1443. commands to the snd-page-alloc driver:
  1444. - add VENDOR DEVICE MASK SIZE BUFFERS
  1445. VENDOR and DEVICE are PCI vendor and device IDs. They take
  1446. integer numbers (0x prefix is needed for the hex).
  1447. MASK is the PCI DMA mask. Pass 0 if not restricted.
  1448. SIZE is the size of each buffer to allocate. You can pass
  1449. k and m suffix for KB and MB. The max number is 16MB.
  1450. BUFFERS is the number of buffers to allocate. It must be greater
  1451. than 0. The max number is 4.
  1452. - erase
  1453. This will erase the all pre-allocated buffers which are not in
  1454. use.
  1455. Links and Addresses
  1456. ===================
  1457. ALSA project homepage
  1458. http://www.alsa-project.org
  1459. ALSA Bug Tracking System
  1460. https://bugtrack.alsa-project.org/bugs/
  1461. ALSA Developers ML
  1462. mailto:alsa-devel@lists.sourceforge.net