Linux kernel mirror (for testing)
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linux
1# ALSA soundcard-configuration
2config SND_TIMER
3 tristate
4
5config SND_PCM
6 tristate
7 select SND_TIMER
8
9config SND_HWDEP
10 tristate
11
12config SND_RAWMIDI
13 tristate
14
15# To be effective this also requires INPUT - users should say:
16# select SND_JACK if INPUT=y || INPUT=SND
17# to avoid having to force INPUT on.
18config SND_JACK
19 bool
20
21config SND_SEQUENCER
22 tristate "Sequencer support"
23 select SND_TIMER
24 help
25 Say Y or M to enable MIDI sequencer and router support. This
26 feature allows routing and enqueueing of MIDI events. Events
27 can be processed at a given time.
28
29 Many programs require this feature, so you should enable it
30 unless you know what you're doing.
31
32config SND_SEQ_DUMMY
33 tristate "Sequencer dummy client"
34 depends on SND_SEQUENCER
35 help
36 Say Y here to enable the dummy sequencer client. This client
37 is a simple MIDI-through client: all normal input events are
38 redirected to the output port immediately.
39
40 You don't need this unless you want to connect many MIDI
41 devices or applications together.
42
43 To compile this driver as a module, choose M here: the module
44 will be called snd-seq-dummy.
45
46config SND_OSSEMUL
47 select SOUND_OSS_CORE
48 bool
49
50config SND_MIXER_OSS
51 tristate "OSS Mixer API"
52 select SND_OSSEMUL
53 help
54 To enable OSS mixer API emulation (/dev/mixer*), say Y here
55 and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
56
57 Many programs still use the OSS API, so say Y.
58
59 To compile this driver as a module, choose M here: the module
60 will be called snd-mixer-oss.
61
62config SND_PCM_OSS
63 tristate "OSS PCM (digital audio) API"
64 select SND_OSSEMUL
65 select SND_PCM
66 help
67 To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y
68 here and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
69
70 Many programs still use the OSS API, so say Y.
71
72 To compile this driver as a module, choose M here: the module
73 will be called snd-pcm-oss.
74
75config SND_PCM_OSS_PLUGINS
76 bool "OSS PCM (digital audio) API - Include plugin system"
77 depends on SND_PCM_OSS
78 default y
79 help
80 If you disable this option, the ALSA's OSS PCM API will not
81 support conversion of channels, formats and rates. It will
82 behave like most of new OSS/Free drivers in 2.4/2.6 kernels.
83
84config SND_SEQUENCER_OSS
85 bool "OSS Sequencer API"
86 depends on SND_SEQUENCER
87 select SND_OSSEMUL
88 help
89 Say Y here to enable OSS sequencer emulation (both
90 /dev/sequencer and /dev/music interfaces).
91
92 Many programs still use the OSS API, so say Y.
93
94 If you choose M in "Sequencer support" (SND_SEQUENCER),
95 this will be compiled as a module. The module will be called
96 snd-seq-oss.
97
98config SND_RTCTIMER
99 tristate "RTC Timer support"
100 depends on RTC
101 select SND_TIMER
102 help
103 Say Y here to enable RTC timer support for ALSA. ALSA uses
104 the RTC timer as a precise timing source and maps the RTC
105 timer to ALSA's timer interface. The ALSA sequencer code also
106 can use this timing source.
107
108 To compile this driver as a module, choose M here: the module
109 will be called snd-rtctimer.
110
111 Note that this option is exclusive with the new RTC drivers
112 (CONFIG_RTC_CLASS) since this requires the old API.
113
114config SND_SEQ_RTCTIMER_DEFAULT
115 bool "Use RTC as default sequencer timer"
116 depends on SND_RTCTIMER && SND_SEQUENCER
117 default y
118 help
119 Say Y here to use the RTC timer as the default sequencer
120 timer. This is strongly recommended because it ensures
121 precise MIDI timing even when the system timer runs at less
122 than 1000 Hz.
123
124 If in doubt, say Y.
125
126config SND_DYNAMIC_MINORS
127 bool "Dynamic device file minor numbers"
128 help
129 If you say Y here, the minor numbers of ALSA device files in
130 /dev/snd/ are allocated dynamically. This allows you to have
131 more than 8 sound cards, but requires a dynamic device file
132 system like udev.
133
134 If you are unsure about this, say N here.
135
136config SND_SUPPORT_OLD_API
137 bool "Support old ALSA API"
138 default y
139 help
140 Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3
141 or older).
142
143config SND_VERBOSE_PROCFS
144 bool "Verbose procfs contents"
145 depends on PROC_FS
146 default y
147 help
148 Say Y here to include code for verbose procfs contents (provides
149 useful information to developers when a problem occurs). On the
150 other side, it makes the ALSA subsystem larger.
151
152config SND_VERBOSE_PRINTK
153 bool "Verbose printk"
154 help
155 Say Y here to enable verbose log messages. These messages
156 will help to identify source file and position containing
157 printed messages.
158
159 You don't need this unless you're debugging ALSA.
160
161config SND_DEBUG
162 bool "Debug"
163 help
164 Say Y here to enable ALSA debug code.
165
166config SND_DEBUG_VERBOSE
167 bool "More verbose debug"
168 depends on SND_DEBUG
169 help
170 Say Y here to enable extra-verbose debugging messages.
171
172 Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages.
173 So, say Y only if you are ready to be annoyed.
174
175config SND_PCM_XRUN_DEBUG
176 bool "Enable PCM ring buffer overrun/underrun debugging"
177 default n
178 depends on SND_DEBUG && SND_VERBOSE_PROCFS
179 help
180 Say Y to enable the PCM ring buffer overrun/underrun debugging.
181 It is usually not required, but if you have trouble with
182 sound clicking when system is loaded, it may help to determine
183 the process or driver which causes the scheduling gaps.
184
185config SND_VMASTER
186 bool