1 # ALSA soundcard-configuration
7 select SND_TIMER if SND_PCM_TIMER
15 config SND_DMAENGINE_PCM
26 select SND_SEQ_DEVICE if SND_SEQUENCER != n
28 config SND_COMPRESS_OFFLOAD
34 # enable input device support in jack layer
35 config SND_JACK_INPUT_DEV
38 default y if INPUT=y || INPUT=SND
41 bool "Enable OSS Emulation"
44 This option enables the build of OSS emulation layer.
47 tristate "OSS Mixer API"
48 depends on SND_OSSEMUL
50 To enable OSS mixer API emulation (/dev/mixer*), say Y here
51 and read <file:Documentation/sound/designs/oss-emulation.rst>.
53 Many programs still use the OSS API, so say Y.
55 To compile this driver as a module, choose M here: the module
56 will be called snd-mixer-oss.
59 tristate "OSS PCM (digital audio) API"
60 depends on SND_OSSEMUL
63 To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y
64 here and read <file:Documentation/sound/designs/oss-emulation.rst>.
66 Many programs still use the OSS API, so say Y.
68 To compile this driver as a module, choose M here: the module
69 will be called snd-pcm-oss.
71 config SND_PCM_OSS_PLUGINS
72 bool "OSS PCM (digital audio) API - Include plugin system"
73 depends on SND_PCM_OSS
76 If you disable this option, the ALSA's OSS PCM API will not
77 support conversion of channels, formats and rates. It will
78 behave like most of new OSS/Free drivers in 2.4/2.6 kernels.
81 bool "PCM timer interface" if EXPERT
84 If you disable this option, pcm timer will be unavailable, so
85 those stubs that use pcm timer (e.g. dmix, dsnoop & co) may work
88 For some embedded devices, we may disable it to reduce memory
89 footprint, about 20KB on x86_64 platform.
92 tristate "HR-timer backend support"
93 depends on HIGH_RES_TIMERS
96 Say Y here to enable HR-timer backend for ALSA timer. ALSA uses
97 the hrtimer as a precise timing source. The ALSA sequencer code
98 also can use this timing source.
100 To compile this driver as a module, choose M here: the module
101 will be called snd-hrtimer.
103 config SND_DYNAMIC_MINORS
104 bool "Dynamic device file minor numbers"
106 If you say Y here, the minor numbers of ALSA device files in
107 /dev/snd/ are allocated dynamically. This allows you to have
108 more than 8 sound cards, but requires a dynamic device file
111 If you are unsure about this, say N here.
114 int "Max number of sound cards"
117 depends on SND_DYNAMIC_MINORS
119 Specify the max number of sound cards that can be assigned
122 config SND_SUPPORT_OLD_API
123 bool "Support old ALSA API"
126 Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3
130 bool "Sound Proc FS Support" if EXPERT
134 Say 'N' to disable Sound proc FS, which may reduce code size about
135 9KB on x86_64 platform.
138 config SND_VERBOSE_PROCFS
139 bool "Verbose procfs contents"
140 depends on SND_PROC_FS
143 Say Y here to include code for verbose procfs contents (provides
144 useful information to developers when a problem occurs). On the
145 other side, it makes the ALSA subsystem larger.
147 config SND_VERBOSE_PRINTK
148 bool "Verbose printk"
150 Say Y here to enable verbose log messages. These messages
151 will help to identify source file and position containing
154 You don't need this unless you're debugging ALSA.
159 Say Y here to enable ALSA debug code.
161 config SND_DEBUG_VERBOSE
162 bool "More verbose debug"
165 Say Y here to enable extra-verbose debugging messages.
167 Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages.
168 So, say Y only if you are ready to be annoyed.
170 config SND_PCM_XRUN_DEBUG
171 bool "Enable PCM ring buffer overrun/underrun debugging"
173 depends on SND_DEBUG && SND_VERBOSE_PROCFS
175 Say Y to enable the PCM ring buffer overrun/underrun debugging.
176 It is usually not required, but if you have trouble with
177 sound clicking when system is loaded, it may help to determine
178 the process or driver which causes the scheduling gaps.
187 source "sound/core/seq/Kconfig"