2 Advanced Linux Sound Architecture - Driver
3 ==========================================
10 To enable ALSA support you need at least to build the kernel with
11 primary sound card support (CONFIG_SOUND). Since ALSA can emulate OSS,
12 you don't have to choose any of the OSS modules.
14 Enable "OSS API emulation" (CONFIG_SND_OSSEMUL) and both OSS mixer and
15 PCM supports if you want to run OSS applications with ALSA.
17 If you want to support the WaveTable functionality on cards such as
18 SB Live! then you need to enable "Sequencer support"
19 (CONFIG_SND_SEQUENCER).
21 To make ALSA debug messages more verbose, enable the "Verbose printk"
22 and "Debug" options. To check for memory leaks, turn on "Debug memory"
23 too. "Debug detection" will add checks for the detection of cards.
25 Please note that all the ALSA ISA drivers support the Linux isapnp API
26 (if the card supports ISA PnP). You don't need to configure the cards
33 This depends on your distribution, but normally you use the /dev/MAKEDEV
34 script to create the necessary device nodes. On some systems you use a
35 script named 'snddevices'.
41 The user can load modules with options. If the module supports more than
42 one card and you have more than one card of the same type then you can
43 specify multiple values for the option separated by commas.
45 Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
50 The core ALSA module. It is used by all ALSA card drivers.
51 It takes the following options which have global effects.
53 major - major number for sound driver
56 - limiting card index for auto-loading (1-8)
58 - For auto-loading more than one card, specify this
59 option together with snd-card-X aliases.
61 - permission mask for dynamic sound device filesystem
62 - This is available only when DEVFS is enabled
64 - E.g.: device_mode=0660
70 The PCM OSS emulation module.
71 This module takes options which change the mapping of devices.
73 dsp_map - PCM device number maps assigned to the 1st OSS device.
75 adsp_map - PCM device number maps assigned to the 2st OSS device.
78 - Don't block opening busy PCM devices. Default: 1
80 For example, when dsp_map=2, /dev/dsp will be mapped to PCM #2 of
81 the card #0. Similarly, when adsp_map=0, /dev/adsp will be mapped
82 to PCM #0 of the card #0.
83 For changing the second or later card, specify the option with
84 commas, such like "dsp_map=0,1".
86 nonblock_open option is used to change the behavior of the PCM
87 regarding opening the device. When this option is non-zero,
88 opening a busy OSS PCM device won't be blocked but return
89 immediately with EAGAIN (just like O_NONBLOCK flag).
94 This module takes options which change the mapping of devices.
95 similar to those of the snd-pcm-oss module.
97 midi_map - MIDI device number maps assigned to the 1st OSS device.
99 amidi_map - MIDI device number maps assigned to the 2st OSS device.
102 Common parameters for top sound card modules
103 --------------------------------------------
105 Each of top level sound card module takes the following options.
107 index - index (slot #) of sound card
108 - Values: 0 through 31 or negative
109 - If nonnegative, assign that index number
110 - if negative, interpret as a bitmask of permissible
111 indices; the first free permitted index is assigned
113 id - card ID (identifier or name)
114 - Can be up to 15 characters long
115 - Default: the card type
116 - A directory by this name is created under /proc/asound/
117 containing information about the card
118 - This ID can be used instead of the index number in
121 - Default: enabled, for PCI and ISA PnP cards
126 Module for sound cards based on Analog Devices AD1816A/AD1815 ISA chips.
128 port - port # for AD1816A chip (PnP setup)
129 mpu_port - port # for MPU-401 UART (PnP setup)
130 fm_port - port # for OPL3 (PnP setup)
131 irq - IRQ # for AD1816A chip (PnP setup)
132 mpu_irq - IRQ # for MPU-401 UART (PnP setup)
133 dma1 - first DMA # for AD1816A chip (PnP setup)
134 dma2 - second DMA # for AD1816A chip (PnP setup)
135 clockfreq - Clock frequency for AD1816A chip (default = 0, 33000Hz)
137 This module supports multiple cards, autoprobe and PnP.
142 Module for sound cards based on AD1848/AD1847/CS4248 ISA chips.
144 port - port # for AD1848 chip
145 irq - IRQ # for AD1848 chip
146 dma1 - DMA # for AD1848 chip (0,1,3)
148 This module supports multiple cards. It does not support autoprobe
149 thus main port must be specified!!! Other ports are optional.
151 The power-management is supported.
156 Module for Analog Devices AD1889 chips.
158 ac97_quirk - AC'97 workaround for strange hardware
159 See the description of intel8x0 module for details.
161 This module supports multiple cards.
166 Module for ALi M5451 PCI chip.
168 pcm_channels - Number of hardware channels assigned for PCM
169 spdif - Support SPDIF I/O
172 This module supports one chip and autoprobe.
174 The power-management is supported.
179 Module for sound cards based on Avance Logic ALS100/ALS120 ISA chips.
181 port - port # for ALS100 (SB16) chip (PnP setup)
182 irq - IRQ # for ALS100 (SB16) chip (PnP setup)
183 dma8 - 8-bit DMA # for ALS100 (SB16) chip (PnP setup)
184 dma16 - 16-bit DMA # for ALS100 (SB16) chip (PnP setup)
185 mpu_port - port # for MPU-401 UART (PnP setup)
186 mpu_irq - IRQ # for MPU-401 (PnP setup)
187 fm_port - port # for OPL3 FM (PnP setup)
189 This module supports multiple cards, autoprobe and PnP.
191 The power-management is supported.
196 Module for sound cards based on Avance Logic ALS4000 PCI chip.
198 joystick_port - port # for legacy joystick support.
199 0 = disabled (default), 1 = auto-detect
201 This module supports multiple cards, autoprobe and PnP.
203 The power-management is supported.
208 Module for ATI IXP 150/200/250/400 AC97 controllers.
210 ac97_clock - AC'97 clock (default = 48000)
211 ac97_quirk - AC'97 workaround for strange hardware
212 See "AC97 Quirk Option" section below.
213 spdif_aclink - S/PDIF transfer over AC-link (default = 1)
215 This module supports one card and autoprobe.
217 ATI IXP has two different methods to control SPDIF output. One is
218 over AC-link and another is over the "direct" SPDIF output. The
219 implementation depends on the motherboard, and you'll need to
220 choose the correct one via spdif_aclink module option.
222 The power-management is supported.
224 Module snd-atiixp-modem
225 -----------------------
227 Module for ATI IXP 150/200/250 AC97 modem controllers.
229 This module supports one card and autoprobe.
231 Note: The default index value of this module is -2, i.e. the first
234 The power-management is supported.
236 Module snd-au8810, snd-au8820, snd-au8830
237 -----------------------------------------
239 Module for Aureal Vortex, Vortex2 and Advantage device.
241 pcifix - Control PCI workarounds
242 0 = Disable all workarounds
243 1 = Force the PCI latency of the Aureal card to 0xff
244 2 = Force the Extend PCI#2 Internal Master for Efficient
245 Handling of Dummy Requests on the VIA KT133 AGP Bridge
246 3 = Force both settings
247 255 = Autodetect what is required (default)
249 This module supports all ADB PCM channels, ac97 mixer, SPDIF, hardware
250 EQ, mpu401, gameport. A3D and wavetable support are still in development.
251 Development and reverse engineering work is being coordinated at
252 http://savannah.nongnu.org/projects/openvortex/
253 SPDIF output has a copy of the AC97 codec output, unless you use the
254 "spdif" pcm device, which allows raw data passthru.
255 The hardware EQ hardware and SPDIF is only present in the Vortex2 and
258 Note: Some ALSA mixer applications don't handle the SPDIF sample rate
259 control correctly. If you have problems regarding this, try
260 another ALSA compliant mixer (alsamixer works).
265 Module for sound cards based on Aztech System AZT2320 ISA chip (PnP only).
267 port - port # for AZT2320 chip (PnP setup)
268 wss_port - port # for WSS (PnP setup)
269 mpu_port - port # for MPU-401 UART (PnP setup)
270 fm_port - FM port # for AZT2320 chip (PnP setup)
271 irq - IRQ # for AZT2320 (WSS) chip (PnP setup)
272 mpu_irq - IRQ # for MPU-401 UART (PnP setup)
273 dma1 - 1st DMA # for AZT2320 (WSS) chip (PnP setup)
274 dma2 - 2nd DMA # for AZT2320 (WSS) chip (PnP setup)
276 This module supports multiple cards, PnP and autoprobe.
278 The power-management is supported.
283 Module for sound cards based on Aztech AZF3328 PCI chip.
285 joystick - Enable joystick (default off)
287 This module supports multiple cards.
292 Module for video cards based on Bt87x chips.
294 digital_rate - Override the default digital rate (Hz)
295 load_all - Load the driver even if the card model isn't known
297 This module supports multiple cards.
299 Note: The default index value of this module is -2, i.e. the first
305 Module for Creative Audigy LS and SB Live 24bit
307 This module supports multiple cards.
313 Module for sound cards based on C-Media CMI8330 ISA chips.
315 wssport - port # for CMI8330 chip (WSS)
316 wssirq - IRQ # for CMI8330 chip (WSS)
317 wssdma - first DMA # for CMI8330 chip (WSS)
318 sbport - port # for CMI8330 chip (SB16)
319 sbirq - IRQ # for CMI8330 chip (SB16)
320 sbdma8 - 8bit DMA # for CMI8330 chip (SB16)
321 sbdma16 - 16bit DMA # for CMI8330 chip (SB16)
323 This module supports multiple cards and autoprobe.
325 The power-management is supported.
330 Module for C-Media CMI8338 and 8738 PCI sound cards.
332 mpu_port - 0x300,0x310,0x320,0x330, 0 = disable (default)
333 fm_port - 0x388 (default), 0 = disable (default)
334 soft_ac3 - Software-conversion of raw SPDIF packets (model 033 only)
336 joystick_port - Joystick port address (0 = disable, 1 = auto-detect)
338 This module supports autoprobe and multiple cards.
340 The power-management is supported.
345 Module for sound cards based on CS4231 ISA chips.
347 port - port # for CS4231 chip
348 mpu_port - port # for MPU-401 UART (optional), -1 = disable
349 irq - IRQ # for CS4231 chip
350 mpu_irq - IRQ # for MPU-401 UART
351 dma1 - first DMA # for CS4231 chip
352 dma2 - second DMA # for CS4231 chip
354 This module supports multiple cards. This module does not support autoprobe
355 thus main port must be specified!!! Other ports are optional.
357 The power-management is supported.
362 Module for sound cards based on CS4232/CS4232A ISA chips.
364 port - port # for CS4232 chip (PnP setup - 0x534)
365 cport - control port # for CS4232 chip (PnP setup - 0x120,0x210,0xf00)
366 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
367 fm_port - FM port # for CS4232 chip (PnP setup - 0x388), -1 = disable
368 irq - IRQ # for CS4232 chip (5,7,9,11,12,15)
369 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
370 dma1 - first DMA # for CS4232 chip (0,1,3)
371 dma2 - second DMA # for Yamaha CS4232 chip (0,1,3), -1 = disable
372 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
374 This module supports multiple cards. This module does not support autoprobe
375 thus main port must be specified!!! Other ports are optional.
377 The power-management is supported.
382 Module for sound cards based on CS4235/CS4236/CS4236B/CS4237B/
383 CS4238B/CS4239 ISA chips.
385 port - port # for CS4236 chip (PnP setup - 0x534)
386 cport - control port # for CS4236 chip (PnP setup - 0x120,0x210,0xf00)
387 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
388 fm_port - FM port # for CS4236 chip (PnP setup - 0x388), -1 = disable
389 irq - IRQ # for CS4236 chip (5,7,9,11,12,15)
390 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
391 dma1 - first DMA # for CS4236 chip (0,1,3)
392 dma2 - second DMA # for CS4236 chip (0,1,3), -1 = disable
393 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
395 This module supports multiple cards. This module does not support autoprobe
396 (if ISA PnP is not used) thus main port and control port must be
397 specified!!! Other ports are optional.
399 The power-management is supported.
404 Module for Cirrus Logic CS4281 soundchip.
406 dual_codec - Secondary codec ID (0 = disable, default)
408 This module supports multiple cards.
410 The power-management is supported.
415 Module for PCI sound cards based on CS4610/CS4612/CS4614/CS4615/CS4622/
416 CS4624/CS4630/CS4280 PCI chips.
418 external_amp - Force to enable external amplifier.
419 thinkpad - Force to enable Thinkpad's CLKRUN control.
420 mmap_valid - Support OSS mmap mode (default = 0).
422 This module supports multiple cards and autoprobe.
423 Usually external amp and CLKRUN controls are detected automatically
424 from PCI sub vendor/device ids. If they don't work, give the options
427 The power-management is supported.
429 Module snd-cs5535audio
430 ----------------------
432 Module for multifunction CS5535 companion PCI device
434 This module supports multiple cards.
439 Module for Diamond Technologies DT-019X / Avance Logic ALS-007 (PnP
442 port - Port # (PnP setup)
443 mpu_port - Port # for MPU-401 (PnP setup)
444 fm_port - Port # for FM OPL-3 (PnP setup)
445 irq - IRQ # (PnP setup)
446 mpu_irq - IRQ # for MPU-401 (PnP setup)
447 dma8 - DMA # (PnP setup)
449 This module supports multiple cards. This module is enabled only with
452 The power-management is supported.
457 Module for the dummy sound card. This "card" doesn't do any output
458 or input, but you may use this module for any application which
459 requires a sound card (like RealPlayer).
461 The power-management is supported.
466 Module for EMU10K1/EMU10k2 based PCI sound cards.
467 * Sound Blaster Live!
468 * Sound Blaster PCI 512
469 * Emu APS (partially supported)
470 * Sound Blaster Audigy
472 extin - bitmap of available external inputs for FX8010 (see bellow)
473 extout - bitmap of available external outputs for FX8010 (see bellow)
474 seq_ports - allocated sequencer ports (4 by default)
475 max_synth_voices - limit of voices used for wavetable (64 by default)
476 max_buffer_size - specifies the maximum size of wavetable/pcm buffers
477 given in MB unit. Default value is 128.
478 enable_ir - enable IR
480 This module supports multiple cards and autoprobe.
482 Input & Output configurations [extin/extout]
483 * Creative Card wo/Digital out [0x0003/0x1f03]
484 * Creative Card w/Digital out [0x0003/0x1f0f]
485 * Creative Card w/Digital CD in [0x000f/0x1f0f]
486 * Creative Card wo/Digital out + LiveDrive [0x3fc3/0x1fc3]
487 * Creative Card w/Digital out + LiveDrive [0x3fc3/0x1fcf]
488 * Creative Card w/Digital CD in + LiveDrive [0x3fcf/0x1fcf]
489 * Creative Card wo/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
490 * Creative Card w/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
491 * Creative Card w/Digital CD in + Digital I/O 2 [0x0fcf/0x1f0f]
492 * Creative Card 5.1/w Digital out + LiveDrive [0x3fc3/0x1fff]
493 * Creative Card 5.1 (c) 2003 [0x3fc3/0x7cff]
494 * Creative Card all ins and outs [0x3fff/0x7fff]
496 The power-management is supported.
501 Module for Creative Emu10k1X (SB Live Dell OEM version)
503 This module supports multiple cards.
508 Module for Ensoniq AudioPCI ES1370 PCI sound cards.
509 * SoundBlaster PCI 64
510 * SoundBlaster PCI 128
512 joystick - Enable joystick (default off)
514 This module supports multiple cards and autoprobe.
519 Module for Ensoniq AudioPCI ES1371 PCI sound cards.
520 * SoundBlaster PCI 64
521 * SoundBlaster PCI 128
522 * SoundBlaster Vibra PCI
524 joystick_port - port # for joystick (0x200,0x208,0x210,0x218),
525 0 = disable (default), 1 = auto-detect
527 This module supports multiple cards and autoprobe.
532 Module for sound cards based on ESS ES968 chip (PnP only).
534 port - port # for ES968 (SB8) chip (PnP setup)
535 irq - IRQ # for ES968 (SB8) chip (PnP setup)
536 dma1 - DMA # for ES968 (SB8) chip (PnP setup)
538 This module supports multiple cards, PnP and autoprobe.
540 The power-management is supported.
545 Module for ESS AudioDrive ES-1688 and ES-688 sound cards.
547 port - port # for ES-1688 chip (0x220,0x240,0x260)
548 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
549 irq - IRQ # for ES-1688 chip (5,7,9,10)
550 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
551 dma8 - DMA # for ES-1688 chip (0,1,3)
553 This module supports multiple cards and autoprobe (without MPU-401 port).
558 Module for ESS AudioDrive ES-18xx sound cards.
560 port - port # for ES-18xx chip (0x220,0x240,0x260)
561 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
562 fm_port - port # for FM (optional, not used)
563 irq - IRQ # for ES-18xx chip (5,7,9,10)
564 dma1 - first DMA # for ES-18xx chip (0,1,3)
565 dma2 - first DMA # for ES-18xx chip (0,1,3)
566 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
568 This module supports multiple cards, ISA PnP and autoprobe (without MPU-401
569 port if native ISA PnP routines are not used).
570 When dma2 is equal with dma1, the driver works as half-duplex.
572 The power-management is supported.
577 Module for sound cards based on ESS Solo-1 (ES1938,ES1946) chips.
579 This module supports multiple cards and autoprobe.
581 The power-management is supported.
586 Module for sound cards based on ESS Maestro-1/2/2E (ES1968/ES1978) chips.
588 total_bufsize - total buffer size in kB (1-4096kB)
589 pcm_substreams_p - playback channels (1-8, default=2)
590 pcm_substreams_c - capture channels (1-8, default=0)
591 clock - clock (0 = auto-detection)
592 use_pm - support the power-management (0 = off, 1 = on,
594 enable_mpu - enable MPU401 (0 = off, 1 = on, 2 = auto (default))
595 joystick - enable joystick (default off)
597 This module supports multiple cards and autoprobe.
599 The power-management is supported.
604 Module for ForteMedia FM801 based PCI sound cards.
606 tea575x_tuner - Enable TEA575x tuner
607 - 1 = MediaForte 256-PCS
608 - 2 = MediaForte 256-PCPR
609 - 3 = MediaForte 64-PCR
610 - High 16-bits are video (radio) device number + 1
611 - example: 0x10002 (MediaForte 256-PCPR, device 1)
613 This module supports multiple cards and autoprobe.
615 The power-management is supported.
617 Module snd-gusclassic
618 ---------------------
620 Module for Gravis UltraSound Classic sound card.
622 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
623 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
624 dma1 - DMA # for GF1 chip (1,3,5,6,7)
625 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
626 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
627 voices - GF1 voices limit (14-32)
628 pcm_voices - reserved PCM voices
630 This module supports multiple cards and autoprobe.
632 Module snd-gusextreme
633 ---------------------
635 Module for Gravis UltraSound Extreme (Synergy ViperMax) sound card.
637 port - port # for ES-1688 chip (0x220,0x230,0x240,0x250,0x260)
638 gf1_port - port # for GF1 chip (0x210,0x220,0x230,0x240,0x250,0x260,0x270)
639 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable
640 irq - IRQ # for ES-1688 chip (5,7,9,10)
641 gf1_irq - IRQ # for GF1 chip (3,5,9,11,12,15)
642 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
643 dma8 - DMA # for ES-1688 chip (0,1,3)
644 dma1 - DMA # for GF1 chip (1,3,5,6,7)
645 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
646 voices - GF1 voices limit (14-32)
647 pcm_voices - reserved PCM voices
649 This module supports multiple cards and autoprobe (without MPU-401 port).
654 Module for Gravis UltraSound MAX sound card.
656 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
657 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
658 dma1 - DMA # for GF1 chip (1,3,5,6,7)
659 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
660 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
661 voices - GF1 voices limit (14-32)
662 pcm_voices - reserved PCM voices
664 This module supports multiple cards and autoprobe.
669 Module for Intel HD Audio (ICH6, ICH6M, ICH7), ATI SB450,
672 model - force the model name
673 position_fix - Fix DMA pointer (0 = auto, 1 = none, 2 = POSBUF, 3 = FIFO size)
674 single_cmd - Use single immediate commands to communicate with
675 codecs (for debugging only)
677 This module supports one card and autoprobe.
679 Each codec may have a model table for different configurations.
680 If your machine isn't listed there, the default (usually minimal)
681 configuration is set up. You can pass "model=<name>" option to
682 specify a certain model in such a case. There are different
683 models depending on the codec chip.
685 Model name Description
686 ---------- -----------
688 3stack 3-jack in back and a headphone out
689 3stack-digout 3-jack in back, a HP out and a SPDIF out
690 5stack 5-jack in back, 2-jack in front
691 5stack-digout 5-jack in back, 2-jack in front, a SPDIF out
692 6stack 6-jack in back, 2-jack in front
693 6stack-digout 6-jack with a SPDIF out
695 z71v 3-jack (HP shared SPDIF)
699 test for testing/debugging purpose, almost all controls can be
700 adjusted. Appearing only when compiled with
705 fujitsu Fujitsu S7020
708 minimal 3-jack in back
709 min_fp 3-jack in back, 2-jack in front
710 full 6-jack in back, 2-jack in front
711 full_dig 6-jack in back, 2-jack in front, SPDIF I/O
712 allout 5-jack in back, 2-jack in front, SPDIF out
713 auto auto-config reading BIOS (default)
715 If the default configuration doesn't work and one of the above
716 matches with your device, report it together with the PCI
717 subsystem ID (output of "lspci -nv") to ALSA BTS or alsa-devel
718 ML (see the section "Links and Addresses").
720 Note 2: If you get click noises on output, try the module option
721 position_fix=1 or 2. position_fix=1 will use the SD_LPIB
722 register value without FIFO size correction as the current
723 DMA pointer. position_fix=2 will make the driver to use
724 the position buffer instead of reading SD_LPIB register.
725 (Usually SD_LPLIB register is more accurate than the
728 NB: If you get many "azx_get_response timeout" messages at
729 loading, it's likely a problem of interrupts (e.g. ACPI irq
730 routing). Try to boot with options like "pci=noacpi". Also, you
731 can try "single_cmd=1" module option. This will switch the
732 communication method between HDA controller and codecs to the
733 single immediate commands instead of CORB/RIRB. Basically, the
734 single command mode is provided only for BIOS, and you won't get
735 unsolicited events, too. But, at least, this works independently
736 from the irq. Remember this is a last resort, and should be
737 avoided as much as possible...
739 The power-management is supported.
744 Module for RME Hammerfall DSP audio interface(s)
746 This module supports multiple cards.
748 Note: The firmware data can be automatically loaded via hotplug
749 when CONFIG_FW_LOADER is set. Otherwise, you need to load
750 the firmware via hdsploader utility included in alsa-tools
752 The firmware data is found in alsa-firmware package.
754 Note: snd-page-alloc module does the job which snd-hammerfall-mem
755 module did formerly. It will allocate the buffers in advance
756 when any HDSP cards are found. To make the buffer
757 allocation sure, load snd-page-alloc module in the early
758 stage of boot sequence. See "Early Buffer Allocation"
764 Module for RME HDSP MADI board.
766 precise_ptr - Enable precise pointer, or disable.
767 line_outs_monitor - Send playback streams to analog outs by default.
768 enable_monitor - Enable Analog Out on Channel 63/64 by default.
770 See hdspm.txt for details.
775 Module for Envy24 (ICE1712) based PCI sound cards.
776 * MidiMan M Audio Delta 1010
777 * MidiMan M Audio Delta 1010LT
778 * MidiMan M Audio Delta DiO 2496
779 * MidiMan M Audio Delta 66
780 * MidiMan M Audio Delta 44
781 * MidiMan M Audio Delta 410
782 * MidiMan M Audio Audiophile 2496
788 * Hoontech SoundTrack DSP 24
789 * Hoontech SoundTrack DSP 24 Value
790 * Hoontech SoundTrack DSP 24 Media 7.1
791 * Event Electronics, EZ8
793 * Lionstracs, Mediastaton
795 model - Use the given board model, one of the following:
796 delta1010, dio2496, delta66, delta44, audiophile, delta410,
797 delta1010lt, vx442, ewx2496, ews88mt, ews88mt_new, ews88d,
798 dmx6fire, dsp24, dsp24_value, dsp24_71, ez8,
799 phase88, mediastation
800 omni - Omni I/O support for MidiMan M-Audio Delta44/66
801 cs8427_timeout - reset timeout for the CS8427 chip (S/PDIF transciever)
802 in msec resolution, default value is 500 (0.5 sec)
804 This module supports multiple cards and autoprobe. Note: The consumer part
805 is not used with all Envy24 based cards (for example in the MidiMan Delta
808 Note: The supported board is detected by reading EEPROM or PCI
809 SSID (if EEPROM isn't available). You can override the
810 model by passing "model" module option in case that the
811 driver isn't configured properly or you want to try another
817 Module for Envy24HT (VT/ICE1724), Envy24PT (VT1720) based PCI sound cards.
818 * MidiMan M Audio Revolution 7.1
820 * TerraTec Aureon 5.1 Sky
821 * TerraTec Aureon 7.1 Space
822 * TerraTec Aureon 7.1 Universe
825 * AudioTrak Prodigy 7.1
826 * AudioTrak Prodigy 192
828 * Albatron K8X800 Pro II
835 model - Use the given board model, one of the following:
836 revo71, amp2000, prodigy71, prodigy192, aureon51,
837 aureon71, universe, k8x800, phase22, phase28, ms300,
840 This module supports multiple cards and autoprobe.
842 Note: The supported board is detected by reading EEPROM or PCI
843 SSID (if EEPROM isn't available). You can override the
844 model by passing "model" module option in case that the
845 driver isn't configured properly or you want to try another
851 Module for AC'97 motherboards from Intel and compatibles.
852 * Intel i810/810E, i815, i820, i830, i84x, MX440
853 ICH5, ICH6, ICH7, ESB2
855 * NVidia NForce, NForce2, NForce3, MCP04, CK804
857 * AMD AMD768, AMD8111
860 ac97_clock - AC'97 codec clock base (0 = auto-detect)
861 ac97_quirk - AC'97 workaround for strange hardware
862 See "AC97 Quirk Option" section below.
863 buggy_irq - Enable workaround for buggy interrupts on some
864 motherboards (default yes on nForce chips,
866 buggy_semaphore - Enable workaround for hardwares with buggy
867 semaphores (e.g. on some ASUS laptops)
870 This module supports one chip and autoprobe.
872 Note: the latest driver supports auto-detection of chip clock.
873 if you still encounter too fast playback, specify the clock
874 explicitly via the module option "ac97_clock=41194".
876 Joystick/MIDI ports are not supported by this driver. If your
877 motherboard has these devices, use the ns558 or snd-mpu401
878 modules, respectively.
880 The power-management is supported.
885 Module for Intel ICH (i8x0) chipset MC97 modems.
886 * Intel i810/810E, i815, i820, i830, i84x, MX440
889 * NVidia NForce, NForce2, NForce2s, NForce3
893 ac97_clock - AC'97 codec clock base (0 = auto-detect)
895 This module supports one card and autoprobe.
897 Note: The default index value of this module is -2, i.e. the first
900 The power-management is supported.
905 Module for Gravis UltraSound PnP, Dynasonic 3-D/Pro, STB Sound Rage 32
906 and other sound cards based on AMD InterWave (tm) chip.
908 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
909 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
910 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
911 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
912 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
913 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
914 pcm_voices - reserved PCM voices for the synthesizer (default 2)
915 effect - 1 = InterWave effects enable (default 0);
918 This module supports multiple cards, autoprobe and ISA PnP.
920 Module snd-interwave-stb
921 ------------------------
923 Module for UltraSound 32-Pro (sound card from STB used by Compaq)
924 and other sound cards based on AMD InterWave (tm) chip with TEA6330T
925 circuit for extended control of bass, treble and master volume.
927 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
928 port_tc - tone control (i2c bus) port # for TEA6330T chip (0x350,0x360,0x370,0x380)
929 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
930 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
931 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
932 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
933 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
934 pcm_voices - reserved PCM voices for the synthesizer (default 2)
935 effect - 1 = InterWave effects enable (default 0);
938 This module supports multiple cards, autoprobe and ISA PnP.
943 Module for Korg 1212 IO PCI card
945 This module supports multiple cards.
950 Module for Allegro/Maestro3 chips
952 external_amp - enable external amp (enabled by default)
953 amp_gpio - GPIO pin number for external amp (0-15) or
954 -1 for default pin (8 for allegro, 1 for
957 This module supports autoprobe and multiple chips.
959 Note: the binding of amplifier is dependent on hardware.
960 If there is no sound even though all channels are unmuted, try to
961 specify other gpio connection via amp_gpio option.
962 For example, a Panasonic notebook might need "amp_gpio=0x0d"
965 The power-management is supported.
970 Module for Digigram miXart8 sound cards.
972 This module supports multiple cards.
973 Note: One miXart8 board will be represented as 4 alsa cards.
974 See MIXART.txt for details.
976 When the driver is compiled as a module and the hotplug firmware
977 is supported, the firmware data is loaded via hotplug automatically.
978 Install the necessary firmware files in alsa-firmware package.
979 When no hotplug fw loader is available, you need to load the
980 firmware via mixartloader utility in alsa-tools package.
985 Module for MPU-401 UART devices.
987 port - port number or -1 (disable)
988 irq - IRQ number or -1 (disable)
989 pnp - PnP detection - 0 = disable, 1 = enable (default)
991 This module supports multiple devices and PnP.
996 Module for MOTU MidiTimePiece AV multiport MIDI (on the parallel
999 port - I/O port # for MTPAV (0x378,0x278, default=0x378)
1000 irq - IRQ # for MTPAV (7,5, default=7)
1001 hwports - number of supported hardware ports, default=8.
1003 Module supports only 1 card. This module has no enable option.
1008 Module for NeoMagic NM256AV/ZX chips
1010 playback_bufsize - max playback frame size in kB (4-128kB)
1011 capture_bufsize - max capture frame size in kB (4-128kB)
1012 force_ac97 - 0 or 1 (disabled by default)
1013 buffer_top - specify buffer top address
1014 use_cache - 0 or 1 (disabled by default)
1015 vaio_hack - alias buffer_top=0x25a800
1016 reset_workaround - enable AC97 RESET workaround for some laptops
1017 reset_workaround2 - enable extended AC97 RESET workaround for some
1020 This module supports one chip and autoprobe.
1022 The power-management is supported.
1024 Note: on some notebooks the buffer address cannot be detected
1025 automatically, or causes hang-up during initialization.
1026 In such a case, specify the buffer top address explicity via
1029 Sony F250: buffer_top=0x25a800
1030 Sony F270: buffer_top=0x272800
1031 The driver supports only ac97 codec. It's possible to force
1032 to initialize/use ac97 although it's not detected. In such a
1033 case, use force_ac97=1 option - but *NO* guarantee whether it
1036 Note: The NM256 chip can be linked internally with non-AC97
1037 codecs. This driver supports only the AC97 codec, and won't work
1038 with machines with other (most likely CS423x or OPL3SAx) chips,
1039 even though the device is detected in lspci. In such a case, try
1040 other drivers, e.g. snd-cs4232 or snd-opl3sa2. Some has ISA-PnP
1041 but some doesn't have ISA PnP. You'll need to specify isapnp=0
1042 and proper hardware parameters in the case without ISA PnP.
1044 Note: some laptops need a workaround for AC97 RESET. For the
1045 known hardware like Dell Latitude LS and Sony PCG-F305, this
1046 workaround is enabled automatically. For other laptops with a
1047 hard freeze, you can try reset_workaround=1 option.
1049 Note: Dell Latitude CSx laptops have another problem regarding
1050 AC97 RESET. On these laptops, reset_workaround2 option is
1051 turned on as default. This option is worth to try if the
1052 previous reset_workaround option doesn't help.
1054 Note: This driver is really crappy. It's a porting from the
1055 OSS driver, which is a result of black-magic reverse engineering.
1056 The detection of codec will fail if the driver is loaded *after*
1057 X-server as described above. You might be able to force to load
1058 the module, but it may result in hang-up. Hence, make sure that
1059 you load this module *before* X if you encounter this kind of
1065 Module for Yamaha OPL3-SA2/SA3 sound cards.
1067 port - control port # for OPL3-SA chip (0x370)
1068 sb_port - SB port # for OPL3-SA chip (0x220,0x240)
1069 wss_port - WSS port # for OPL3-SA chip (0x530,0xe80,0xf40,0x604)
1070 midi_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1071 fm_port - FM port # for OPL3-SA chip (0x388), -1 = disable
1072 irq - IRQ # for OPL3-SA chip (5,7,9,10)
1073 dma1 - first DMA # for Yamaha OPL3-SA chip (0,1,3)
1074 dma2 - second DMA # for Yamaha OPL3-SA chip (0,1,3), -1 = disable
1075 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1077 This module supports multiple cards and ISA PnP. It does not support
1078 autoprobe (if ISA PnP is not used) thus all ports must be specified!!!
1080 The power-management is supported.
1082 Module snd-opti92x-ad1848
1083 -------------------------
1085 Module for sound cards based on OPTi 82c92x and Analog Devices AD1848 chips.
1086 Module works with OAK Mozart cards as well.
1088 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1089 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1090 fm_port - port # for OPL3 device (0x388)
1091 irq - IRQ # for WSS chip (5,7,9,10,11)
1092 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1093 dma1 - first DMA # for WSS chip (0,1,3)
1095 This module supports only one card, autoprobe and PnP.
1097 Module snd-opti92x-cs4231
1098 -------------------------
1100 Module for sound cards based on OPTi 82c92x and Crystal CS4231 chips.
1102 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1103 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1104 fm_port - port # for OPL3 device (0x388)
1105 irq - IRQ # for WSS chip (5,7,9,10,11)
1106 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1107 dma1 - first DMA # for WSS chip (0,1,3)
1108 dma2 - second DMA # for WSS chip (0,1,3)
1110 This module supports only one card, autoprobe and PnP.
1115 Module for sound cards based on OPTi 82c93x chips.
1117 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1118 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1119 fm_port - port # for OPL3 device (0x388)
1120 irq - IRQ # for WSS chip (5,7,9,10,11)
1121 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1122 dma1 - first DMA # for WSS chip (0,1,3)
1123 dma2 - second DMA # for WSS chip (0,1,3)
1125 This module supports only one card, autoprobe and PnP.
1130 Module for Digigram PCXHR boards
1132 This module supports multiple cards.
1134 Module snd-powermac (on ppc only)
1135 ---------------------------------
1137 Module for PowerMac, iMac and iBook on-board soundchips
1139 enable_beep - enable beep using PCM (enabled as default)
1141 Module supports autoprobe a chip.
1143 Note: the driver may have problems regarding endianess.
1145 The power-management is supported.
1147 Module snd-pxa2xx-ac97 (on arm only)
1148 ------------------------------------
1150 Module for AC97 driver for the Intel PXA2xx chip
1152 For ARM architecture only.
1154 The power-management is supported.
1159 Module for RME Digi32, Digi32 Pro and Digi32/8 (Sek'd Prodif32,
1160 Prodif96 and Prodif Gold) sound cards.
1162 This module supports multiple cards.
1167 Module for RME Digi96, Digi96/8 and Digi96/8 PRO/PAD/PST sound cards.
1169 This module supports multiple cards.
1174 Module for RME Digi9652 (Hammerfall, Hammerfall-Light) sound cards.
1176 precise_ptr - Enable precise pointer (doesn't work reliably).
1179 This module supports multiple cards.
1181 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1182 module did formerly. It will allocate the buffers in advance
1183 when any RME9652 cards are found. To make the buffer
1184 allocation sure, load snd-page-alloc module in the early
1185 stage of boot sequence. See "Early Buffer Allocation"
1188 Module snd-sa11xx-uda1341 (on arm only)
1189 ---------------------------------------
1191 Module for Philips UDA1341TS on Compaq iPAQ H3600 sound card.
1193 Module supports only one card.
1194 Module has no enable and index options.
1196 The power-management is supported.
1201 Module for 8-bit SoundBlaster cards: SoundBlaster 1.0,
1205 port - port # for SB DSP chip (0x220,0x240,0x260)
1206 irq - IRQ # for SB DSP chip (5,7,9,10)
1207 dma8 - DMA # for SB DSP chip (1,3)
1209 This module supports multiple cards and autoprobe.
1211 The power-management is supported.
1213 Module snd-sb16 and snd-sbawe
1214 -----------------------------
1216 Module for 16-bit SoundBlaster cards: SoundBlaster 16 (PnP),
1217 SoundBlaster AWE 32 (PnP),
1218 SoundBlaster AWE 64 PnP
1220 port - port # for SB DSP 4.x chip (0x220,0x240,0x260)
1221 mpu_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1222 awe_port - base port # for EMU8000 synthesizer (0x620,0x640,0x660)
1223 (snd-sbawe module only)
1224 irq - IRQ # for SB DSP 4.x chip (5,7,9,10)
1225 dma8 - 8-bit DMA # for SB DSP 4.x chip (0,1,3)
1226 dma16 - 16-bit DMA # for SB DSP 4.x chip (5,6,7)
1227 mic_agc - Mic Auto-Gain-Control - 0 = disable, 1 = enable (default)
1228 csp - ASP/CSP chip support - 0 = disable (default), 1 = enable
1229 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1231 This module supports multiple cards, autoprobe and ISA PnP.
1233 Note: To use Vibra16X cards in 16-bit half duplex mode, you must
1234 disable 16bit DMA with dma16 = -1 module parameter.
1235 Also, all Sound Blaster 16 type cards can operate in 16-bit
1236 half duplex mode through 8-bit DMA channel by disabling their
1239 The power-management is supported.
1244 Module for Aztech Sound Galaxy sound card.
1246 sbport - Port # for SB16 interface (0x220,0x240)
1247 wssport - Port # for WSS interface (0x530,0xe80,0xf40,0x604)
1248 irq - IRQ # (7,9,10,11)
1251 This module supports multiple cards.
1253 The power-management is supported.
1258 Module for ENSONIQ SoundScape PnP cards.
1260 port - Port # (PnP setup)
1261 irq - IRQ # (PnP setup)
1262 mpu_irq - MPU-401 IRQ # (PnP setup)
1263 dma - DMA # (PnP setup)
1265 This module supports multiple cards. ISA PnP must be enabled.
1266 You need sscape_ctl tool in alsa-tools package for loading
1269 Module snd-sun-amd7930 (on sparc only)
1270 --------------------------------------
1272 Module for AMD7930 sound chips found on Sparcs.
1274 This module supports multiple cards.
1276 Module snd-sun-cs4231 (on sparc only)
1277 -------------------------------------
1279 Module for CS4231 sound chips found on Sparcs.
1281 This module supports multiple cards.
1283 Module snd-sun-dbri (on sparc only)
1284 -----------------------------------
1286 Module for DBRI sound chips found on Sparcs.
1288 This module supports multiple cards.
1290 Module snd-wavefront
1291 --------------------
1293 Module for Turtle Beach Maui, Tropez and Tropez+ sound cards.
1295 cs4232_pcm_port - Port # for CS4232 PCM interface.
1296 cs4232_pcm_irq - IRQ # for CS4232 PCM interface (5,7,9,11,12,15).
1297 cs4232_mpu_port - Port # for CS4232 MPU-401 interface.
1298 cs4232_mpu_irq - IRQ # for CS4232 MPU-401 interface (9,11,12,15).
1299 use_cs4232_midi - Use CS4232 MPU-401 interface
1300 (inaccessibly located inside your computer)
1301 ics2115_port - Port # for ICS2115
1302 ics2115_irq - IRQ # for ICS2115
1303 fm_port - FM OPL-3 Port #
1304 dma1 - DMA1 # for CS4232 PCM interface.
1305 dma2 - DMA2 # for CS4232 PCM interface.
1306 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1308 This module supports multiple cards and ISA PnP.
1310 Module snd-sonicvibes
1311 ---------------------
1313 Module for S3 SonicVibes PCI sound cards.
1314 * PINE Schubert 32 PCI
1316 reverb - Reverb Enable - 1 = enable, 0 = disable (default)
1317 - SoundCard must have onboard SRAM for this.
1318 mge - Mic Gain Enable - 1 = enable, 0 = disable (default)
1320 This module supports multiple cards and autoprobe.
1322 Module snd-serial-u16550
1323 ------------------------
1325 Module for UART16550A serial MIDI ports.
1327 port - port # for UART16550A chip
1328 irq - IRQ # for UART16550A chip, -1 = poll mode
1329 speed - speed in bauds (9600,19200,38400,57600,115200)
1331 base - base for divisor in bauds (57600,115200,230400,460800)
1333 outs - number of MIDI ports in a serial port (1-4)
1335 adaptor - Type of adaptor.
1336 0 = Soundcanvas, 1 = MS-124T, 2 = MS-124W S/A,
1337 3 = MS-124W M/B, 4 = Generic
1339 This module supports multiple cards. This module does not support autoprobe
1340 thus the main port must be specified!!! Other options are optional.
1345 Module for Trident 4DWave DX/NX sound cards.
1346 * Best Union Miss Melody 4DWave PCI
1348 * Warpspeed ONSpeed 4DWave PCI
1351 * CHIC True Sound 4Dwave
1352 * Shark Predator4D-PCI
1353 * Jaton SonicWave 4D
1355 pcm_channels - max channels (voices) reserved for PCM
1356 wavetable_size - max wavetable size in kB (4-?kb)
1358 This module supports multiple cards and autoprobe.
1360 The power-management is supported.
1362 Module snd-usb-audio
1363 --------------------
1365 Module for USB audio and USB MIDI devices.
1367 vid - Vendor ID for the device (optional)
1368 pid - Product ID for the device (optional)
1370 This module supports multiple devices, autoprobe and hotplugging.
1372 Module snd-usb-usx2y
1373 --------------------
1375 Module for Tascam USB US-122, US-224 and US-428 devices.
1377 This module supports multiple devices, autoprobe and hotplugging.
1379 Note: you need to load the firmware via usx2yloader utility included
1380 in alsa-tools and alsa-firmware packages.
1385 Module for AC'97 motherboards based on VIA 82C686A/686B, 8233,
1386 8233A, 8233C, 8235, 8237 (south) bridge.
1388 mpu_port - 0x300,0x310,0x320,0x330, otherwise obtain BIOS setup
1390 joystick - Enable joystick (default off) [VIA686A/686B only]
1391 ac97_clock - AC'97 codec clock base (default 48000Hz)
1392 dxs_support - support DXS channels,
1393 0 = auto (default), 1 = enable, 2 = disable,
1394 3 = 48k only, 4 = no VRA, 5 = enable any sample
1395 rate and different sample rates on different
1397 [VIA8233/C, 8235, 8237 only]
1398 ac97_quirk - AC'97 workaround for strange hardware
1399 See "AC97 Quirk Option" section below.
1401 This module supports one chip and autoprobe.
1403 Note: on some SMP motherboards like MSI 694D the interrupts might
1404 not be generated properly. In such a case, please try to
1405 set the SMP (or MPS) version on BIOS to 1.1 instead of
1406 default value 1.4. Then the interrupt number will be
1407 assigned under 15. You might also upgrade your BIOS.
1409 Note: VIA8233/5/7 (not VIA8233A) can support DXS (direct sound)
1410 channels as the first PCM. On these channels, up to 4
1411 streams can be played at the same time, and the controller
1412 can perform sample rate conversion with separate rates for
1414 As default (dxs_support = 0), 48k fixed rate is chosen
1415 except for the known devices since the output is often
1416 noisy except for 48k on some mother boards due to the
1418 Please try once dxs_support=5 and if it works on other
1419 sample rates (e.g. 44.1kHz of mp3 playback), please let us
1420 know the PCI subsystem vendor/device id's (output of
1422 If dxs_support=5 does not work, try dxs_support=4; if it
1423 doesn't work too, try dxs_support=1. (dxs_support=1 is
1424 usually for old motherboards. The correct implemented
1425 board should work with 4 or 5.) If it still doesn't
1426 work and the default setting is ok, dxs_support=3 is the
1427 right choice. If the default setting doesn't work at all,
1428 try dxs_support=2 to disable the DXS channels.
1429 In any cases, please let us know the result and the
1430 subsystem vendor/device ids. See "Links and Addresses"
1433 Note: for the MPU401 on VIA823x, use snd-mpu401 driver
1434 additionally. The mpu_port option is for VIA686 chips only.
1436 The power-management is supported.
1438 Module snd-via82xx-modem
1439 ------------------------
1441 Module for VIA82xx AC97 modem
1443 ac97_clock - AC'97 codec clock base (default 48000Hz)
1445 This module supports one card and autoprobe.
1447 Note: The default index value of this module is -2, i.e. the first
1450 The power-management is supported.
1455 Module for virtual rawmidi devices.
1456 This module creates virtual rawmidi devices which communicate
1457 to the corresponding ALSA sequencer ports.
1459 midi_devs - MIDI devices # (1-4, default=4)
1461 This module supports multiple cards.
1466 Module for Digigram VX-Pocket VX222, V222 v2 and Mic cards.
1468 mic - Enable Microphone on V222 Mic (NYI)
1469 ibl - Capture IBL size. (default = 0, minimum size)
1471 This module supports multiple cards.
1473 When the driver is compiled as a module and the hotplug firmware
1474 is supported, the firmware data is loaded via hotplug automatically.
1475 Install the necessary firmware files in alsa-firmware package.
1476 When no hotplug fw loader is available, you need to load the
1477 firmware via vxloader utility in alsa-tools package. To invoke
1478 vxloader automatically, add the following to /etc/modprobe.conf
1480 install snd-vx222 /sbin/modprobe --first-time -i snd-vx222 && /usr/bin/vxloader
1482 (for 2.2/2.4 kernels, add "post-install /usr/bin/vxloader" to
1483 /etc/modules.conf, instead.)
1484 IBL size defines the interrupts period for PCM. The smaller size
1485 gives smaller latency but leads to more CPU consumption, too.
1486 The size is usually aligned to 126. As default (=0), the smallest
1487 size is chosen. The possible IBL values can be found in
1488 /proc/asound/cardX/vx-status proc file.
1490 The power-management is supported.
1495 Module for Digigram VX-Pocket VX2 and 440 PCMCIA cards.
1497 ibl - Capture IBL size. (default = 0, minimum size)
1499 This module supports multiple cards. The module is compiled only when
1500 PCMCIA is supported on kernel.
1502 With the older 2.6.x kernel, to activate the driver via the card
1503 manager, you'll need to set up /etc/pcmcia/vxpocket.conf. See the
1504 sound/pcmcia/vx/vxpocket.c. 2.6.13 or later kernel requires no
1505 longer require a config file.
1507 When the driver is compiled as a module and the hotplug firmware
1508 is supported, the firmware data is loaded via hotplug automatically.
1509 Install the necessary firmware files in alsa-firmware package.
1510 When no hotplug fw loader is available, you need to load the
1511 firmware via vxloader utility in alsa-tools package.
1513 About capture IBL, see the description of snd-vx222 module.
1515 Note: the driver is build only when CONFIG_ISA is set.
1517 Note2: snd-vxp440 driver is merged to snd-vxpocket driver since
1520 The power-management is supported.
1525 Module for Yamaha PCI chips (YMF72x, YMF74x & YMF75x).
1527 mpu_port - 0x300,0x330,0x332,0x334, 0 (disable) by default,
1528 1 (auto-detect for YMF744/754 only)
1529 fm_port - 0x388,0x398,0x3a0,0x3a8, 0 (disable) by default
1530 1 (auto-detect for YMF744/754 only)
1531 joystick_port - 0x201,0x202,0x204,0x205, 0 (disable) by default,
1533 rear_switch - enable shared rear/line-in switch (bool)
1535 This module supports autoprobe and multiple chips.
1537 The power-management is supported.
1539 Module snd-pdaudiocf
1540 --------------------
1542 Module for Sound Core PDAudioCF sound card.
1544 Note: the driver is build only when CONFIG_ISA is set.
1546 The power-management is supported.
1552 The ac97_quirk option is used to enable/override the workaround for
1553 specific devices on drivers for on-board AC'97 controllers like
1554 snd-intel8x0. Some hardware have swapped output pins between Master
1555 and Headphone, or Surround (thanks to confusion of AC'97
1556 specifications from version to version :-)
1558 The driver provides the auto-detection of known problematic devices,
1559 but some might be unknown or wrongly detected. In such a case, pass
1560 the proper value with this option.
1562 The following strings are accepted:
1563 - default Don't override the default setting
1564 - none Disable the quirk
1565 - hp_only Bind Master and Headphone controls as a single control
1566 - swap_hp Swap headphone and master controls
1567 - swap_surround Swap master and surround controls
1568 - ad_sharing For AD1985, turn on OMS bit and use headphone
1569 - alc_jack For ALC65x, turn on the jack sense mode
1570 - inv_eapd Inverted EAPD implementation
1571 - mute_led Bind EAPD bit for turning on/off mute LED
1573 For backward compatibility, the corresponding integer value -1, 0,
1574 ... are accepted, too.
1576 For example, if "Master" volume control has no effect on your device
1577 but only "Headphone" does, pass ac97_quirk=hp_only module option.
1580 Configuring Non-ISAPNP Cards
1581 ============================
1583 When the kernel is configured with ISA-PnP support, the modules
1584 supporting the isapnp cards will have module options "isapnp".
1585 If this option is set, *only* the ISA-PnP devices will be probed.
1586 For probing the non ISA-PnP cards, you have to pass "isapnp=0" option
1587 together with the proper i/o and irq configuration.
1589 When the kernel is configured without ISA-PnP support, isapnp option
1590 will be not built in.
1593 Module Autoloading Support
1594 ==========================
1596 The ALSA drivers can be loaded automatically on demand by defining
1597 module aliases. The string 'snd-card-%1' is requested for ALSA native
1598 devices where %i is sound card number from zero to seven.
1600 To auto-load an ALSA driver for OSS services, define the string
1601 'sound-slot-%i' where %i means the slot number for OSS, which
1602 corresponds to the card index of ALSA. Usually, define this
1603 as the same card module.
1605 An example configuration for a single emu10k1 card is like below:
1606 ----- /etc/modprobe.conf
1607 alias snd-card-0 snd-emu10k1
1608 alias sound-slot-0 snd-emu10k1
1609 ----- /etc/modprobe.conf
1611 The available number of auto-loaded sound cards depends on the module
1612 option "cards_limit" of snd module. As default it's set to 1.
1613 To enable the auto-loading of multiple cards, specify the number of
1614 sound cards in that option.
1616 When multiple cards are available, it'd better to specify the index
1617 number for each card via module option, too, so that the order of
1618 cards is kept consistent.
1620 An example configuration for two sound cards is like below:
1622 ----- /etc/modprobe.conf
1624 options snd cards_limit=2
1625 alias snd-card-0 snd-interwave
1626 alias snd-card-1 snd-ens1371
1627 options snd-interwave index=0
1628 options snd-ens1371 index=1
1630 alias sound-slot-0 snd-interwave
1631 alias sound-slot-1 snd-ens1371
1632 ----- /etc/moprobe.conf
1634 In this example, the interwave card is always loaded as the first card
1635 (index 0) and ens1371 as the second (index 1).
1638 ALSA PCM devices to OSS devices mapping
1639 =======================================
1641 /dev/snd/pcmC0D0[c|p] -> /dev/audio0 (/dev/audio) -> minor 4
1642 /dev/snd/pcmC0D0[c|p] -> /dev/dsp0 (/dev/dsp) -> minor 3
1643 /dev/snd/pcmC0D1[c|p] -> /dev/adsp0 (/dev/adsp) -> minor 12
1644 /dev/snd/pcmC1D0[c|p] -> /dev/audio1 -> minor 4+16 = 20
1645 /dev/snd/pcmC1D0[c|p] -> /dev/dsp1 -> minor 3+16 = 19
1646 /dev/snd/pcmC1D1[c|p] -> /dev/adsp1 -> minor 12+16 = 28
1647 /dev/snd/pcmC2D0[c|p] -> /dev/audio2 -> minor 4+32 = 36
1648 /dev/snd/pcmC2D0[c|p] -> /dev/dsp2 -> minor 3+32 = 39
1649 /dev/snd/pcmC2D1[c|p] -> /dev/adsp2 -> minor 12+32 = 44
1651 The first number from /dev/snd/pcmC{X}D{Y}[c|p] expression means
1652 sound card number and second means device number. The ALSA devices
1653 have either 'c' or 'p' suffix indicating the direction, capture and
1654 playback, respectively.
1656 Please note that the device mapping above may be varied via the module
1657 options of snd-pcm-oss module.
1663 The ALSA driver fully supports the devfs extension.
1664 You should add lines below to your devfsd.conf file:
1666 LOOKUP snd MODLOAD ACTION snd
1667 REGISTER ^sound/.* PERMISSIONS root.audio 660
1668 REGISTER ^snd/.* PERMISSIONS root.audio 660
1670 Warning: These lines assume that you have the audio group in your system.
1671 Otherwise replace audio word with another group name (root for
1675 Proc interfaces (/proc/asound)
1676 ==============================
1678 /proc/asound/card#/pcm#[cp]/oss
1679 -------------------------------
1680 String "erase" - erase all additional informations about OSS applications
1681 String "<app_name> <fragments> <fragment_size> [<options>]"
1683 <app_name> - name of application with (higher priority) or without path
1684 <fragments> - number of fragments or zero if auto
1685 <fragment_size> - size of fragment in bytes or zero if auto
1686 <options> - optional parameters
1687 - disable the application tries to open a pcm device for
1688 this channel but does not want to use it.
1689 (Cause a bug or mmap needs)
1690 It's good for Quake etc...
1691 - direct don't use plugins
1692 - block force block mode (rvplayer)
1693 - non-block force non-block mode
1694 - whole-frag write only whole fragments (optimization affecting
1696 - no-silence do not fill silence ahead to avoid clicks
1697 - buggy-ptr Returns the whitespace blocks in GETOPTR ioctl
1698 instead of filled blocks
1700 Example: echo "x11amp 128 16384" > /proc/asound/card0/pcm0p/oss
1701 echo "squake 0 0 disable" > /proc/asound/card0/pcm0c/oss
1702 echo "rvplayer 0 0 block" > /proc/asound/card0/pcm0p/oss
1705 Early Buffer Allocation
1706 =======================
1708 Some drivers (e.g. hdsp) require the large contiguous buffers, and
1709 sometimes it's too late to find such spaces when the driver module is
1710 actually loaded due to memory fragmentation. You can pre-allocate the
1711 PCM buffers by loading snd-page-alloc module and write commands to its
1712 proc file in prior, for example, in the early boot stage like
1713 /etc/init.d/*.local scripts.
1715 Reading the proc file /proc/drivers/snd-page-alloc shows the current
1716 usage of page allocation. In writing, you can send the following
1717 commands to the snd-page-alloc driver:
1719 - add VENDOR DEVICE MASK SIZE BUFFERS
1721 VENDOR and DEVICE are PCI vendor and device IDs. They take
1722 integer numbers (0x prefix is needed for the hex).
1723 MASK is the PCI DMA mask. Pass 0 if not restricted.
1724 SIZE is the size of each buffer to allocate. You can pass
1725 k and m suffix for KB and MB. The max number is 16MB.
1726 BUFFERS is the number of buffers to allocate. It must be greater
1727 than 0. The max number is 4.
1731 This will erase the all pre-allocated buffers which are not in
1738 ALSA project homepage
1739 http://www.alsa-project.org
1741 ALSA Bug Tracking System
1742 https://bugtrack.alsa-project.org/bugs/
1745 mailto:alsa-devel@lists.sourceforge.net