11da177e4SLinus Torvalds# ALSA soundcard-configuration 21da177e4SLinus Torvaldsconfig SND_TIMER 31da177e4SLinus Torvalds tristate 41da177e4SLinus Torvalds 51da177e4SLinus Torvaldsconfig SND_PCM 61da177e4SLinus Torvalds tristate 71da177e4SLinus Torvalds select SND_TIMER 81da177e4SLinus Torvalds 91da177e4SLinus Torvaldsconfig SND_HWDEP 101da177e4SLinus Torvalds tristate 111da177e4SLinus Torvalds 121da177e4SLinus Torvaldsconfig SND_RAWMIDI 131da177e4SLinus Torvalds tristate 141da177e4SLinus Torvalds 150d94e41aSMark Brown# To be effective this also requires INPUT - users should say: 160d94e41aSMark Brown# select SND_JACK if INPUT=y || INPUT=SND 170d94e41aSMark Brown# to avoid having to force INPUT on. 180d94e41aSMark Brownconfig SND_JACK 190d94e41aSMark Brown bool 200d94e41aSMark Brown 211da177e4SLinus Torvaldsconfig SND_SEQUENCER 221da177e4SLinus Torvalds tristate "Sequencer support" 231da177e4SLinus Torvalds select SND_TIMER 241da177e4SLinus Torvalds help 251da177e4SLinus Torvalds Say Y or M to enable MIDI sequencer and router support. This 261da177e4SLinus Torvalds feature allows routing and enqueueing of MIDI events. Events 271da177e4SLinus Torvalds can be processed at a given time. 281da177e4SLinus Torvalds 291da177e4SLinus Torvalds Many programs require this feature, so you should enable it 301da177e4SLinus Torvalds unless you know what you're doing. 311da177e4SLinus Torvalds 321da177e4SLinus Torvaldsconfig SND_SEQ_DUMMY 331da177e4SLinus Torvalds tristate "Sequencer dummy client" 341da177e4SLinus Torvalds depends on SND_SEQUENCER 351da177e4SLinus Torvalds help 361da177e4SLinus Torvalds Say Y here to enable the dummy sequencer client. This client 371da177e4SLinus Torvalds is a simple MIDI-through client: all normal input events are 381da177e4SLinus Torvalds redirected to the output port immediately. 391da177e4SLinus Torvalds 401da177e4SLinus Torvalds You don't need this unless you want to connect many MIDI 411da177e4SLinus Torvalds devices or applications together. 421da177e4SLinus Torvalds 431da177e4SLinus Torvalds To compile this driver as a module, choose M here: the module 441da177e4SLinus Torvalds will be called snd-seq-dummy. 451da177e4SLinus Torvalds 461da177e4SLinus Torvaldsconfig SND_OSSEMUL 47d886e87cSTejun Heo select SOUND_OSS_CORE 481da177e4SLinus Torvalds bool 491da177e4SLinus Torvalds 501da177e4SLinus Torvaldsconfig SND_MIXER_OSS 511da177e4SLinus Torvalds tristate "OSS Mixer API" 521da177e4SLinus Torvalds select SND_OSSEMUL 531da177e4SLinus Torvalds help 541da177e4SLinus Torvalds To enable OSS mixer API emulation (/dev/mixer*), say Y here 551da177e4SLinus Torvalds and read <file:Documentation/sound/alsa/OSS-Emulation.txt>. 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds Many programs still use the OSS API, so say Y. 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds To compile this driver as a module, choose M here: the module 601da177e4SLinus Torvalds will be called snd-mixer-oss. 611da177e4SLinus Torvalds 621da177e4SLinus Torvaldsconfig SND_PCM_OSS 631da177e4SLinus Torvalds tristate "OSS PCM (digital audio) API" 641da177e4SLinus Torvalds select SND_OSSEMUL 651da177e4SLinus Torvalds select SND_PCM 661da177e4SLinus Torvalds help 671da177e4SLinus Torvalds To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y 681da177e4SLinus Torvalds here and read <file:Documentation/sound/alsa/OSS-Emulation.txt>. 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds Many programs still use the OSS API, so say Y. 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds To compile this driver as a module, choose M here: the module 731da177e4SLinus Torvalds will be called snd-pcm-oss. 741da177e4SLinus Torvalds 7521a3479aSJaroslav Kyselaconfig SND_PCM_OSS_PLUGINS 7621a3479aSJaroslav Kysela bool "OSS PCM (digital audio) API - Include plugin system" 7721a3479aSJaroslav Kysela depends on SND_PCM_OSS 7821a3479aSJaroslav Kysela default y 7921a3479aSJaroslav Kysela help 8021a3479aSJaroslav Kysela If you disable this option, the ALSA's OSS PCM API will not 8121a3479aSJaroslav Kysela support conversion of channels, formats and rates. It will 8221a3479aSJaroslav Kysela behave like most of new OSS/Free drivers in 2.4/2.6 kernels. 8321a3479aSJaroslav Kysela 841da177e4SLinus Torvaldsconfig SND_SEQUENCER_OSS 851da177e4SLinus Torvalds bool "OSS Sequencer API" 8689fe5117STakashi Iwai depends on SND_SEQUENCER 871da177e4SLinus Torvalds select SND_OSSEMUL 881da177e4SLinus Torvalds help 891da177e4SLinus Torvalds Say Y here to enable OSS sequencer emulation (both 901da177e4SLinus Torvalds /dev/sequencer and /dev/music interfaces). 911da177e4SLinus Torvalds 921da177e4SLinus Torvalds Many programs still use the OSS API, so say Y. 931da177e4SLinus Torvalds 94c2f60c52SFrederik Deweerdt If you choose M in "Sequencer support" (SND_SEQUENCER), 95c2f60c52SFrederik Deweerdt this will be compiled as a module. The module will be called 96c2f60c52SFrederik Deweerdt snd-seq-oss. 971da177e4SLinus Torvalds 981da177e4SLinus Torvaldsconfig SND_RTCTIMER 991da177e4SLinus Torvalds tristate "RTC Timer support" 10089fe5117STakashi Iwai depends on RTC 1011da177e4SLinus Torvalds select SND_TIMER 1021da177e4SLinus Torvalds help 1031da177e4SLinus Torvalds Say Y here to enable RTC timer support for ALSA. ALSA uses 1041da177e4SLinus Torvalds the RTC timer as a precise timing source and maps the RTC 1051da177e4SLinus Torvalds timer to ALSA's timer interface. The ALSA sequencer code also 1061da177e4SLinus Torvalds can use this timing source. 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds To compile this driver as a module, choose M here: the module 1091da177e4SLinus Torvalds will be called snd-rtctimer. 1101da177e4SLinus Torvalds 11152948b3fSTakashi Iwai Note that this option is exclusive with the new RTC drivers 11252948b3fSTakashi Iwai (CONFIG_RTC_CLASS) since this requires the old API. 11352948b3fSTakashi Iwai 114a4f508b2SClemens Ladischconfig SND_SEQ_RTCTIMER_DEFAULT 115a4f508b2SClemens Ladisch bool "Use RTC as default sequencer timer" 116a4f508b2SClemens Ladisch depends on SND_RTCTIMER && SND_SEQUENCER 117a4f508b2SClemens Ladisch default y 118a4f508b2SClemens Ladisch help 119a4f508b2SClemens Ladisch Say Y here to use the RTC timer as the default sequencer 120a4f508b2SClemens Ladisch timer. This is strongly recommended because it ensures 121a4f508b2SClemens Ladisch precise MIDI timing even when the system timer runs at less 122a4f508b2SClemens Ladisch than 1000 Hz. 123a4f508b2SClemens Ladisch 124a4f508b2SClemens Ladisch If in doubt, say Y. 125a4f508b2SClemens Ladisch 126332682b1SClemens Ladischconfig SND_DYNAMIC_MINORS 127b10e5391SClemens Ladisch bool "Dynamic device file minor numbers" 128332682b1SClemens Ladisch help 129332682b1SClemens Ladisch If you say Y here, the minor numbers of ALSA device files in 130332682b1SClemens Ladisch /dev/snd/ are allocated dynamically. This allows you to have 131332682b1SClemens Ladisch more than 8 sound cards, but requires a dynamic device file 132332682b1SClemens Ladisch system like udev. 133332682b1SClemens Ladisch 134332682b1SClemens Ladisch If you are unsure about this, say N here. 135332682b1SClemens Ladisch 13659d48582STakashi Iwaiconfig SND_SUPPORT_OLD_API 13759d48582STakashi Iwai bool "Support old ALSA API" 13859d48582STakashi Iwai default y 13959d48582STakashi Iwai help 14059d48582STakashi Iwai Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3 14159d48582STakashi Iwai or older). 14259d48582STakashi Iwai 14321a3479aSJaroslav Kyselaconfig SND_VERBOSE_PROCFS 14421a3479aSJaroslav Kysela bool "Verbose procfs contents" 14589fe5117STakashi Iwai depends on PROC_FS 14621a3479aSJaroslav Kysela default y 14721a3479aSJaroslav Kysela help 14821a3479aSJaroslav Kysela Say Y here to include code for verbose procfs contents (provides 149a982ac06SMatt LaPlante useful information to developers when a problem occurs). On the 15021a3479aSJaroslav Kysela other side, it makes the ALSA subsystem larger. 15121a3479aSJaroslav Kysela 1521da177e4SLinus Torvaldsconfig SND_VERBOSE_PRINTK 1531da177e4SLinus Torvalds bool "Verbose printk" 1541da177e4SLinus Torvalds help 1551da177e4SLinus Torvalds Say Y here to enable verbose log messages. These messages 1561da177e4SLinus Torvalds will help to identify source file and position containing 1571da177e4SLinus Torvalds printed messages. 1581da177e4SLinus Torvalds 1591da177e4SLinus Torvalds You don't need this unless you're debugging ALSA. 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvaldsconfig SND_DEBUG 1621da177e4SLinus Torvalds bool "Debug" 1631da177e4SLinus Torvalds help 1641da177e4SLinus Torvalds Say Y here to enable ALSA debug code. 1651da177e4SLinus Torvalds 16662cf872aSTakashi Iwaiconfig SND_DEBUG_VERBOSE 16762cf872aSTakashi Iwai bool "More verbose debug" 1681da177e4SLinus Torvalds depends on SND_DEBUG 1691da177e4SLinus Torvalds help 17062cf872aSTakashi Iwai Say Y here to enable extra-verbose debugging messages. 17162cf872aSTakashi Iwai 17262cf872aSTakashi Iwai Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages. 17362cf872aSTakashi Iwai So, say Y only if you are ready to be annoyed. 17461fb63c0SJaroslav Kysela 17561fb63c0SJaroslav Kyselaconfig SND_PCM_XRUN_DEBUG 17661fb63c0SJaroslav Kysela bool "Enable PCM ring buffer overrun/underrun debugging" 17761fb63c0SJaroslav Kysela default n 178b7d90a35STakashi Iwai depends on SND_DEBUG && SND_VERBOSE_PROCFS 17961fb63c0SJaroslav Kysela help 18061fb63c0SJaroslav Kysela Say Y to enable the PCM ring buffer overrun/underrun debugging. 18161fb63c0SJaroslav Kysela It is usually not required, but if you have trouble with 18261fb63c0SJaroslav Kysela sound clicking when system is loaded, it may help to determine 18361fb63c0SJaroslav Kysela the process or driver which causes the scheduling gaps. 184e922b002STakashi Iwai 185e922b002STakashi Iwaiconfig SND_VMASTER 186e922b002STakashi Iwai bool 187