# ALSA soundcard-configuration
config [31mCONFIG_SND_TIMER[0m
tristate
config [31mCONFIG_SND_PCM[0m
tristate
select [31mCONFIG_SND_TIMER[0m if [31mCONFIG_SND_PCM_TIMER[0m
config [31mCONFIG_SND_PCM_ELD[0m
bool
config [31mCONFIG_SND_PCM_IEC958[0m
bool
config [31mCONFIG_SND_DMAENGINE_PCM[0m
tristate
config [31mCONFIG_SND_HWDEP[0m
tristate
config [31mCONFIG_SND_RAWMIDI[0m
tristate
config [31mCONFIG_SND_COMPRESS_OFFLOAD[0m
tristate
config [31mCONFIG_SND_JACK[0m
bool
# enable input device support in jack layer
config [31mCONFIG_SND_JACK_INPUT_DEV[0m
bool
depends on [31mCONFIG_SND_JACK[0m
default y if [31mCONFIG_INPUT[0m=y || [31mCONFIG_INPUT[0m=[31mCONFIG_SND[0m
config [31mCONFIG_SND_SEQUENCER[0m
tristate "Sequencer support"
select [31mCONFIG_SND_TIMER[0m
help
Say Y or [31mCONFIG_M[0m to enable MIDI sequencer and router support. This
feature allows routing and enqueueing of MIDI events. Events
can be processed at a given time.
Many programs require this feature, so you should enable it
unless you know what you're doing.
config [31mCONFIG_SND_SEQ_DUMMY[0m
tristate "Sequencer dummy client"
depends on [31mCONFIG_SND_SEQUENCER[0m
help
Say Y here to enable the dummy sequencer client. This client
is a simple MIDI-through client: all normal input events are
redirected to the output port immediately.
You don't need this unless you want to connect many MIDI
devices or applications together.
To compile this driver as a module, choose [31mCONFIG_M[0m here: the module
will be called snd-seq-dummy.
config [31mCONFIG_SND_OSSEMUL[0m
select [31mCONFIG_SOUND_OSS_CORE[0m
bool
config [31mCONFIG_SND_MIXER_OSS[0m
tristate "OSS Mixer API"
select [31mCONFIG_SND_OSSEMUL[0m
help
To enable OSS mixer API emulation (/dev/mixer*), say Y here
and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
Many programs still use the OSS API, so say Y.
To compile this driver as a module, choose [31mCONFIG_M[0m here: the module
will be called snd-mixer-oss.
config [31mCONFIG_SND_PCM_OSS[0m
tristate "OSS PCM (digital audio) API"
select [31mCONFIG_SND_OSSEMUL[0m
select [31mCONFIG_SND_PCM[0m
help
To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y
here and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
Many programs still use the OSS API, so say Y.
To compile this driver as a module, choose [31mCONFIG_M[0m here: the module
will be called snd-pcm-oss.
config [31mCONFIG_SND_PCM_OSS_PLUGINS[0m
bool "OSS PCM (digital audio) API - Include plugin system"
depends on [31mCONFIG_SND_PCM_OSS[0m
default y
help
If you disable this option, the ALSA's OSS PCM API will not
support conversion of channels, formats and rates. It will
behave like most of new OSS/Free drivers in 2.4/2.6 kernels.
config [31mCONFIG_SND_PCM_TIMER[0m
bool "PCM timer interface" if [31mCONFIG_EXPERT[0m
default y
help
If you disable this option, pcm timer will be unavailable, so
those stubs that use pcm timer (e.g. dmix, dsnoop & co) may work
incorrectlly.
For some embedded devices, we may disable it to reduce memory
footprint, about 20KB on x86_64 platform.
config [31mCONFIG_SND_SEQUENCER_OSS[0m
bool "OSS Sequencer API"
depends on [31mCONFIG_SND_SEQUENCER[0m
select [31mCONFIG_SND_OSSEMUL[0m
help
Say Y here to enable OSS sequencer emulation (both
/dev/sequencer and /dev/music interfaces).
Many programs still use the OSS API, so say Y.
If you choose [31mCONFIG_M[0m in "Sequencer support" ([31mCONFIG_SND_SEQUENCER[0m),
this will be compiled as a module. The module will be called
snd-seq-oss.
config [31mCONFIG_SND_HRTIMER[0m
tristate "HR-timer backend support"
depends on [31mCONFIG_HIGH_RES_TIMERS[0m
select [31mCONFIG_SND_TIMER[0m
help
Say Y here to enable HR-timer backend for ALSA timer. ALSA uses
the hrtimer as a precise timing source. The ALSA sequencer code
also can use this timing source.
To compile this driver as a module, choose [31mCONFIG_M[0m here: the module
will be called snd-hrtimer.
config [31mCONFIG_SND_SEQ_HRTIMER_DEFAULT[0m
bool "Use HR-timer as default sequencer timer"
depends on [31mCONFIG_SND_HRTIMER[0m && [31mCONFIG_SND_SEQUENCER[0m
default y
help
Say Y here to use the HR-timer backend as the default sequencer
timer.
config [31mCONFIG_SND_DYNAMIC_MINORS[0m
bool "Dynamic device file minor numbers"
help
If you say Y here, the minor numbers of ALSA device files in
/dev/snd/ are allocated dynamically. This allows you to have
more than 8 sound cards, but requires a dynamic device file
system like udev.
If you are unsure about this, say N here.
config [31mCONFIG_SND_MAX_CARDS[0m
int "Max number of sound cards"
range 4 256
default 32
depends on [31mCONFIG_SND_DYNAMIC_MINORS[0m
help
Specify the max number of sound cards that can be assigned
on a single machine.
config [31mCONFIG_SND_SUPPORT_OLD_API[0m
bool "Support old ALSA API"
default y
help
Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3
or older).
config [31mCONFIG_SND_PROC_FS[0m
bool "Sound Proc FS Support" if [31mCONFIG_EXPERT[0m
depends on [31mCONFIG_PROC_FS[0m
default y
help
Say 'N' to disable Sound proc FS, which may reduce code size about
9KB on x86_64 platform.
If unsure say Y.
config [31mCONFIG_SND_VERBOSE_PROCFS[0m
bool "Verbose procfs contents"
depends on [31mCONFIG_SND_PROC_FS[0m
default y
help
Say Y here to include code for verbose procfs contents (provides
useful information to developers when a problem occurs). On the
other side, it makes the ALSA subsystem larger.
config [31mCONFIG_SND_VERBOSE_PRINTK[0m
bool "Verbose printk"
help
Say Y here to enable verbose log messages. These messages
will help to identify source file and position containing
printed messages.
You don't need this unless you're debugging ALSA.
config [31mCONFIG_SND_DEBUG[0m
bool "Debug"
help
Say Y here to enable ALSA debug code.
config [31mCONFIG_SND_DEBUG_VERBOSE[0m
bool "More verbose debug"
depends on [31mCONFIG_SND_DEBUG[0m
help
Say Y here to enable extra-verbose debugging messages.
Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages.
So, say Y only if you are ready to be annoyed.
config [31mCONFIG_SND_PCM_XRUN_DEBUG[0m
bool "Enable PCM ring buffer overrun/underrun debugging"
default n
depends on [31mCONFIG_SND_DEBUG[0m && [31mCONFIG_SND_VERBOSE_PROCFS[0m
help
Say Y to enable the PCM ring buffer overrun/underrun debugging.
It is usually not required, but if you have trouble with
sound clicking when system is loaded, it may help to determine
the process or driver which causes the scheduling gaps.
config [31mCONFIG_SND_VMASTER[0m
bool
config [31mCONFIG_SND_DMA_SGBUF[0m
def_bool y
depends on [31mCONFIG_X86[0m
source "sound/core/seq/Kconfig"