# The top level shared pseudo device, with both PCM and CTL interfaces
# The device names "default", "dsp0", "mixer0" have conventional meanings.

# The top level shared pseudo device, with both PCM and CTL interfaces
# The ALSA default is "!default", but many programs like XMMS and aoss
# assume "dsp0" as default name for PCM and "mixer0" for CTL.

# Amazingly, XMMS has problems if one defines 'pcm.dsp0' to be
# 'plug' for 'pcm.asym0' and not directly as 'asym0'.

pcm.!default            { type                  plug;
                          slave.pcm             "dmix0"; }
ctl.!default            { type hw; card 0; }

pcm.dsp0                { type                  plug;
                          slave.pcm             "dmix0"; } 

ctl.dsp0                { type hw; card 0; }
ctl.mixer0              { type hw; card 0; }

########################################################################

# Buffering (period time defaults to 125000 usecs).

# Size of period, expressed either in usec or byte units:
#   period_time USECS
#   period_size BYTES

# Size of buffers, expressed either in period, usec, or byte units:
#   periods     PERIODS
#   buffer_time USECS
#   buffer_size BYTES

# The ALSA docs have examples with 'period_time' set to 0,
# when 'period_size' and 'buffer_size' are used instead,
# but this can cause trouble in later releases of ALSA.

# For OSS compatibility, 'period_size' and 'buffer_size'
# should be powers of 2. Also, many cards cannot accept
# a 'period_size' much greater than 4096, so 4096 is safe.
# On my VIA 8233A, any value for 'period_time' greater than
# 85333 usecs (precisely!) causes hiccups in sound output.
# Why? At 48kHz, 85333 usec are are just over 4096 bytes/channel.

pcm.dmix0               { type                  dmix;
                          ipc_key               13759;

                          slave.pcm             "hw:0,0";
                          slave.channels        2;

                          slave.rate            48000;
                          slave.period_size     4096;
                          slave.buffer_size     16384;

                          slave.period_time     84000;
                          slave.buffer_time     340000;

                          # Map only the first two channels
                          bindings.0            0;
                          bindings.1            1; }