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# Configuration file syntax
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# Include a new configuration file
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<filename>
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# Simple assign
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name [=] value [,|;]
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# Compound assign (first style)
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name [=] {
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name1 [=] value [,|;]
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...
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}
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# Compound assign (second style)
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name.name1 [=] value [,|;]
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# Array assign (first style)
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name [
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value0 [,|;]
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value1 [,|;]
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...
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]
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# Array assign (second style)
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name.0 [=] value0 [,|;]
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name.1 [=] value1 [,|;]
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# ******************************************************************************
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# Server definition
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server.NAME {
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host STR # host where the server is located (if map to local address
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# server is local, and then it may be started automatically)
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[socket STR] # PF_LOCAL socket name to listen/connect
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[port INT] # PF_INET port number to listen/connect
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}
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# PCM type definition
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pcm_type.NAME {
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[lib STR] # Library file (default libasound.so)
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[open STR] # Open function (default _snd_pcm_NAME_open)
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[redirect { # Redirect this PCM to an another
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[filename STR] # Configuration file specification
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name STR # PCM name specification
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}]
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}
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# PCM scope type definition
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pcm_scope_type.NAME {
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[lib STR] # Library file (default libasound.so)
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[open STR] # Open function (default _snd_pcm_scope_NAME_open)
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}
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# PCM scope definition
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pcm_scope.NAME {
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type STR # Scope type
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...
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}
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# Slave PCM definition
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pcm_slave.NAME {
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pcm STR # PCM name
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# or
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pcm { } # PCM definition
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format STR # Format
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channels INT # Channels
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rate INT # Rate
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period_time INT # Period time
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buffer_time INT # Buffer time
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etc.
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}
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# Hook arguments definition
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hook_args.NAME {
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... # Arbitrary arguments
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}
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# PCM hook type
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pcm_hook_type.NAME {
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[lib STR] # Library file (default libasound.so)
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[install STR] # Install function (default _snd_pcm_hook_NAME_install)
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}
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# PCM hook definition
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pcm_hook.NAME {
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type STR # PCM Hook type (see pcm_hook_type)
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[args STR] # Arguments for install function (see hook_args)
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# or
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[args { }] # Arguments for install function
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}
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# PCM definition
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pcm.NAME {
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type STR # Type
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[comment ANY] # Saved comments
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# PCM types:
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type hw # Kernel PCM
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card INT/STR # Card name or number
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[device] INT # Device number (default 0)
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[subdevice] INT # Subdevice number, -1 first available (default -1)
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mmap_emulation BOOL # enable mmap emulation for ro/wo devices
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type hooks # PCM with hooks
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slave STR # Slave name (see pcm_slave)
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# or
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slave { # Slave definition
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pcm STR # Slave PCM name
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# or
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pcm { } # Slave PCM definition
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}
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hooks {
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ID STR # Hook name (see pcm_hook)
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# or
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ID { } # Hook definition (see pcm_hook)
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}
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type plug # Format adjusted PCM
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slave STR # Slave name (see pcm_slave)
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# or
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slave { # Slave definition
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pcm STR # Slave PCM name
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# or
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pcm { } # Slave PCM definition
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[format STR] # Slave format (default nearest) or "unchanged"
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[channels INT] # Slave channels (default nearest) or "unchanged"
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[rate INT] # Slave rate (default nearest) or "unchanged"
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}
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route_policy STR # route policy for automatic ttable generation
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# STR can be 'default', 'average', 'copy', 'duplicate'
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# average: result is average of input channels
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# copy: only first channels are copied to destination
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# duplicate: duplicate first set of channels
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# default: copy policy, except for mono capture - sum
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ttable { # Transfer table (bidimensional compound of
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# cchannels * schannels numbers)
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CCHANNEL {
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SCHANNEL REAL # route value (0.0 ... 1.0)
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}
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}
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type copy # Copy conversion PCM
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slave STR # Slave name (see pcm_slave)
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# or
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slave { # Slave definition
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pcm STR # Slave PCM name
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# or
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pcm { } # Slave PCM definition
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}
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type linear # Linear format conversion PCM
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type adpcm # IMA-ADPCM format conversion PCM
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type alaw # A-Law format conversion PCM
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type mulaw # Mu-Law format conversion PCM
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slave STR # Slave name (see pcm_slave)
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# or
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slave { # Slave definition
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pcm STR # Slave PCM name
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# or
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pcm { } # Slave PCM definition
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format STR # Slave format
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}
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type rate # Rate conversion PCM
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slave STR # Slave name (see pcm_slave)
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# or
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slave { # Slave definition
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pcm STR # Slave PCM name
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# or
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pcm { } # Slave PCM definition
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[format STR] # Slave format (default client format)
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rate INT # Slave rate
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}
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type route # Attenuated static route PCM
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slave STR # Slave name (see pcm_slave)
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# or
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slave { # Slave definition
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pcm STR # Slave PCM name
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# or
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pcm { } # Slave PCM definition
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[format STR] # Slave format (default client format)
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[channels INT] # Slave channels (default client channels)
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}
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ttable { # Transfer table (bidimensional compound of
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# cchannels * schannels numbers)
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CCHANNEL {
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SCHANNEL REAL # route value (0.0 ... 1.0)
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}
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}
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type multi # Linked PCMs (exclusive access to selected channels)
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slaves { # Slaves definitions
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ID STR # Slave name for slave N (see pcm_slave)
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# or
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ID { # Slave definition for slave N
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pcm STR # Slave PCM name
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# or
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pcm { } # Slave PCM definition
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channels INT # Slave channels
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}
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}
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bindings { # Bindings table
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N { # Binding for client channel N
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slave STR # Slave key
|
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channel INT # Slave channel
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}
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}
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[master INT] # Define the master slave
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type file # File plugin
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slave STR # Slave name (see pcm_slave)
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# or
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slave { # Slave definition
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pcm STR # Slave PCM name
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# or
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pcm { } # Slave PCM definition
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}
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file STR # File name
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# or
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file INT # File descriptor
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[format STR] # File format (NYI)
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[perm INT] # File permission (default 0600)
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type meter # Meter PCM
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slave STR # Slave name (see pcm_slave)
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# or
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slave { # Slave definition or name
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pcm STR # Slave PCM name
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# or
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pcm { } # Slave PCM definition
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}
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[frequency INT] # Updates per second
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scopes { # Scopes
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ID STR # Scope name (see pcm_scope)
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# or
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ID { } # Scope definition (see pcm_scope)
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}
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type droute # Attenuated dynamic route PCM (NYI)
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slave STR # Slave name (see pcm_slave)
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# or
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slave { # Slave definition
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|
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pcm STR # Slave PCM name
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|
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# or
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|
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pcm { } # Slave PCM definition
|
|
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[format STR] # Slave format (default client format)
|
|
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[channels INT] # Slave channels (default client channels)
|
|
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}
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|
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ctl STR # Ctl name
|
|
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bindings { # Bindings table
|
|
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ID { # Binding entry
|
|
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cchannels { # Client channels
|
|
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C INT # Client channel
|
|
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}
|
|
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schannel { # Slave channels
|
|
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S INT # Slave channel
|
|
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}
|
|
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control STR # Control name of C * S (or C values: only if C == S)
|
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}
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|
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}
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|
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|
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type null # Null endpoint plugin
|
|
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[time INT] # Time related or not (NYI)
|
|
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|
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|
|
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type shm # Shared memory client PCM
|
|
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server STR # Server name
|
|
Packit |
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pcm STR # PCM name on server
|
|
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|
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|
|
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type share # Share PCM
|
|
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slave STR # Slave name (see pcm_slave)
|
|
Packit |
4a16fb |
bindings { # Bindings table
|
|
Packit |
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N INT # Slave channel for client channel N
|
|
Packit |
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}
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|
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|
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4a16fb |
|
|
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type mix # Mix PCM
|
|
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4a16fb |
slave STR # Slave name (see pcm_slave)
|
|
Packit |
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bindings { # Bindings table
|
|
Packit |
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N INT # Slave channel for client channel N
|
|
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}
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|
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|
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4a16fb |
|
|
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type ladspa # LADSPA plugin PCM
|
|
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slave STR # Slave name (see pcm_slave)
|
|
Packit |
4a16fb |
path STR # Path or paths (delimited with ':')
|
|
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4a16fb |
plugins | playback_plugins | capture_plugins {
|
|
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4a16fb |
N { # Configuration for LADSPA plugin N
|
|
Packit |
4a16fb |
id # # LADSPA plugin ID (for example 1043)
|
|
Packit |
4a16fb |
label STR # LADSPA plugin label (for example 'delay_5s')
|
|
Packit |
4a16fb |
filename STR # Full filename of .so library with LADPA plugin code
|
|
Packit |
4a16fb |
policy STR # Policy can be 'none' or 'duplicate'
|
|
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4a16fb |
input | output {
|
|
Packit |
4a16fb |
bindings {
|
|
Packit |
4a16fb |
C INT or STR # C - channel, INT - audio port index, STR - audio port name
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
controls {
|
|
Packit |
4a16fb |
I INT or REAL # I - control port index, INT or REAL - control value
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
}
|
|
Packit |
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}
|
|
Packit |
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}
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|
|
Packit |
4a16fb |
type dmix # Direct mixing plugin
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Packit |
4a16fb |
slave STR # Slave name (see pcm_slave)
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Packit |
4a16fb |
ipc_key INT # Unique ipc key
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Packit |
4a16fb |
ipc_perm INT # ipc permissions (default 0600)
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Packit |
4a16fb |
ipc_gid INT # ipc gid (default -1 = disable)
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Packit |
4a16fb |
ipc_key_add_uid BOOL # Add current uid to ipc_key
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Packit |
4a16fb |
bindings { # Bindings table
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Packit |
4a16fb |
N INT # Slave channel for client channel N
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Packit |
4a16fb |
}
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Packit |
4a16fb |
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Packit |
4a16fb |
type dsnoop # Direct snoop (split one capture stream to more)
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Packit |
4a16fb |
slave STR # Slave name (see pcm_slave)
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Packit |
4a16fb |
ipc_key INT # Unique ipc key
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Packit |
4a16fb |
ipc_perm INT # ipc permissions (default 0600)
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Packit |
4a16fb |
ipc_gid INT # ipc gid (default -1 = disable)
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Packit |
4a16fb |
ipc_key_add_uid BOOL # Add current uid to ipc_key
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Packit |
4a16fb |
bindings { # Bindings table
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Packit |
4a16fb |
N INT # Slave channel for client channel N
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Packit |
4a16fb |
}
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Packit |
4a16fb |
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Packit |
4a16fb |
type dshare # Share channels from one stream
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Packit |
4a16fb |
slave STR # Slave name (see pcm_slave)
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Packit |
4a16fb |
ipc_key INT # Unique ipc key
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Packit |
4a16fb |
ipc_perm INT # ipc permissions (default 0600)
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Packit |
4a16fb |
ipc_gid INT # ipc gid (default -1 = disable)
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Packit |
4a16fb |
ipc_key_add_uid BOOL # Add current uid to ipc_key
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Packit |
4a16fb |
bindings { # Bindings table
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Packit |
4a16fb |
N INT # Slave channel for client channel N
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Packit |
4a16fb |
}
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Packit |
4a16fb |
}
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Packit |
4a16fb |
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Packit |
4a16fb |
# CTL type definition
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Packit |
4a16fb |
ctl_type.NAME {
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Packit |
4a16fb |
[lib STR] # Library file (default libasound.so)
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Packit |
4a16fb |
[open STR] # Open function (default _snd_ctl_NAME_open)
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Packit |
4a16fb |
}
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Packit |
4a16fb |
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Packit |
4a16fb |
# CTL definition
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Packit |
4a16fb |
ctl.NAME {
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Packit |
4a16fb |
type STR # Type
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Packit |
4a16fb |
[comment ANY] # Saved comments
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Packit |
4a16fb |
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Packit |
4a16fb |
# CTL types
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Packit |
4a16fb |
type hw
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Packit |
4a16fb |
card STR/INT # Card name or number
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Packit |
4a16fb |
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Packit |
4a16fb |
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Packit |
4a16fb |
type shm # Shared memory client CTL
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Packit |
4a16fb |
server STR # Server name
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Packit |
4a16fb |
ctl STR # CTL name on server
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Packit |
4a16fb |
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Packit |
4a16fb |
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Packit |
4a16fb |
}
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Packit |
4a16fb |
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Packit |
4a16fb |
|
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Packit |
4a16fb |
# RAWMIDI type definition
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Packit |
4a16fb |
rawmidi_type.NAME {
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Packit |
4a16fb |
[lib STR] # Library file (default libasound.so)
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Packit |
4a16fb |
[open STR] # Open function (default _snd_rawmidi_NAME_open)
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|
Packit |
4a16fb |
}
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|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
# RAWMIDI definition
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|
Packit |
4a16fb |
rawmidi.NAME {
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|
Packit |
4a16fb |
type STR # Type
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|
Packit |
4a16fb |
[comment ANY] # Saved comments
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|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
# RAWMIDI types:
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|
Packit |
4a16fb |
type hw # Kernel RAWMIDI
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Packit |
4a16fb |
card INT/STR # Card name or number
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|
Packit |
4a16fb |
[device] INT # Device number (default 0)
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|
Packit |
4a16fb |
[subdevice] INT # Subdevice number, -1 first available (default -1)
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|
Packit |
4a16fb |
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|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
}
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|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
# SEQ type definition
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|
Packit |
4a16fb |
seq_type.NAME {
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|
Packit |
4a16fb |
[lib STR] # Library file (default libasound.so)
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|
Packit |
4a16fb |
[open STR] # Open function (default _snd_seq_NAME_open)
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|
Packit |
4a16fb |
}
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|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
# SEQ definition
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|
Packit |
4a16fb |
seq.NAME {
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|
Packit |
4a16fb |
type STR # Type
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|
Packit |
4a16fb |
[comment ANY] # Saved comments
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|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
# SEQ types:
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|
Packit |
4a16fb |
type hw # Kernel SEQ
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Packit |
4a16fb |
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
}
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|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
# Aliases
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Packit |
4a16fb |
DEF.NAME1 NAME2 # DEF.NAME1 is an alias for DEF.NAME2
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Packit |
4a16fb |
|
|
Packit |
4a16fb |
Some examples:
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|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
pcm.trident {
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|
Packit |
4a16fb |
type hw
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|
Packit |
4a16fb |
card 0
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|
Packit |
4a16fb |
device 0
|
|
Packit |
4a16fb |
}
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|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
pcm.ice1712 {
|
|
Packit |
4a16fb |
type hw
|
|
Packit |
4a16fb |
card 1
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|
Packit |
4a16fb |
device 0
|
|
Packit |
4a16fb |
}
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|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
pcm.ice1712_spdif {
|
|
Packit |
4a16fb |
type plug
|
|
Packit |
4a16fb |
ttable.0.8 1
|
|
Packit |
4a16fb |
ttable.1.9 1
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|
Packit |
4a16fb |
slave.pcm ice1712
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
pcm_slave.rs {
|
|
Packit |
4a16fb |
pcm trident
|
|
Packit |
4a16fb |
rate 44100
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
pcm.r {
|
|
Packit |
4a16fb |
type rate
|
|
Packit |
4a16fb |
slave rs
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
pcm.m {
|
|
Packit |
4a16fb |
type meter
|
|
Packit |
4a16fb |
slave.pcm plug:trident
|
|
Packit |
4a16fb |
frequency 50
|
|
Packit |
4a16fb |
scopes [
|
|
Packit |
4a16fb |
{
|
|
Packit |
4a16fb |
type level
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
]
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
pcm_scope_type.level {
|
|
Packit |
4a16fb |
lib /home/abramo/scopes/scope-level.so
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
# an example command is 'aplay -D plug:ladspa <filename>'
|
|
Packit |
4a16fb |
# otherwise, the ladspa plugin expects FLOAT type which
|
|
Packit |
4a16fb |
# is very rare
|
|
Packit |
4a16fb |
pcm.ladspa {
|
|
Packit |
4a16fb |
type ladspa
|
|
Packit |
4a16fb |
slave.pcm "plughw:0,0";
|
|
Packit |
4a16fb |
path "/home/perex/src/ladspa_sdk/plugins";
|
|
Packit |
4a16fb |
plugins [
|
|
Packit |
4a16fb |
{
|
|
Packit |
4a16fb |
label delay_5s
|
|
Packit |
4a16fb |
input {
|
|
Packit |
4a16fb |
controls [ 0.8 0.2 ]
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
]
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
# an example command for dmix plugin to force 44100Hz mixing rate:
|
|
Packit |
4a16fb |
# aplay -D"plug:'dmix:RATE=44100'" <filename>
|
|
Packit |
4a16fb |
# an example command for dmix plugin to force 44100Hz and hw:1,0 output device
|
|
Packit |
4a16fb |
# aplay -Dplug:\'dmix:SLAVE=\"hw:1,0\",RATE=44100\' <filename>
|
|
Packit |
4a16fb |
# an example command for dmix plugin to force 32-bit signed little endian format
|
|
Packit |
4a16fb |
# aplay -D"plug:'dmix:FORMAT=S32_LE'" <filename>
|