[mythtv-users] Editing .asoundrc for Xine 5.1 passthru with SB Live!

[Jim Oltman]

I assume you are trying to output via SPDIF.  What do you get when you
run aplay -l.  That's a lowercase L.  That will list out your devices
on your sound card.  In my asound.conf I have my digital out PCM as
device 0,2.  Here is my asound.conf:

# Override the default output used by ALSA.
# If you do not override the default, your default
# device is identical to the (unmixed) analog device
# shown below.  If you prefer mixed and/or digital
# output, uncomment the appropriate four lines below
# (only one slave.pcm line).
pcm.!default {
  type plug
## Uncomment the following to use mixed analog by default
#  slave.pcm "dmix-analog"
## Uncomment the following to use unmixed digital by default
  slave.pcm "digital-hw"
## Uncomment the following to use mixed digital by default
#  slave.pcm "dmix-digital"
}

# Alias for analog output on the nForce2 (hw:0,0)
# - This is identical to the device named "default"--which
# always exists and refers to hw:0,0 (unless overridden)
# - Therefore, we can specify "hw:0,0", "default", or "analog"
# to access analog output on the nForce2
pcm.analog {
 type plug
 slave.pcm "analog-hw"
}

# Control device (mixer, etc.) for the nForce2 card
ctl.analog {
 type hw
 card 0
}

# Alias for (rate-converted) mixed analog output on the
# nForce2 (hw:0,0)
#  - This will accept audio input--regardless of rate--and
# convert to the rate required for the dmix plugin
# (in this case 48000Hz)
pcm.mixed-analog {
 type plug
 slave.pcm "dmix-analog"
}

# Control device (mixer, etc.) for the nForce2 card
ctl.mixed-analog {
 type hw
 card 0
}

# Alias for (rate-converted) digital (S/PDIF) output on the
# nForce2 (hw:0,2)
#  - This will accept audio input--regardless of rate--and
# convert to the rate required for the S/PDIF hardware
# (in this case 48000Hz)
pcm.digital {
 type plug
 slave.pcm "digital-hw"
}

# Control device (mixer, etc.) for the nForce2 card
ctl.digital {
 type hw
 card 0
}

# Alias for mixed (rate-converted) digital (S/PDIF) output on the
# nForce2 (hw:0,2)
#  - This will accept audio input--regardless of rate--and
# convert to the rate required for the S/PDIF hardware
# (in this case 48000Hz)
pcm.mixed-digital {
 type plug
 slave.pcm "dmix-digital"
}

# Control device (mixer, etc.) for the nForce2 card
ctl.mixed-digital {
 type hw
 card 0
}

# The following devices are not useful by themselves.  They
# require specific rates, channels, and formats.  Therefore,
# you probably do not want to use them directly.  Instead use
# of of the devices defined above.

# Alias for analog output on the nForce2 (hw:0,0)
# Do not use this directly--it requires specific rate,
# channels, and format
pcm.analog-hw {
 type hw
 card 0
 # The default value for device is 0, so no need to specify
}

# Control device (mixer, etc.) for the nForce2 card
ctl.analog-hw {
 type hw
 card 0
}

# Alias for digital (S/PDIF) output on the nForce2 (hw:0,2)
# Do not use this directly--it requires specific rate,
# channels, and format
pcm.digital-hw {
 type hw
 card 0
 device 2
}

# Control device (mixer, etc.) for the nForce2 card
ctl.digital-hw {
 type hw
 card 0
}

# Direct software mixing plugin for analog output on
# the nForce2 (hw:0,0)
# Do not use this directly--it requires specific rate,
# channels, and format
pcm.dmix-analog {
 type dmix
 ipc_key 1234
 slave {
   pcm "analog-hw"
   period_time 0
   period_size 1024
   buffer_size 4096
   rate 48000
 }
}

# Control device (mixer, etc.) for the nForce2 card
ctl.dmix-analog {
 type hw
 card 0
}

# Direct software mixing plugin for digital (S/PDIF) output
# on the nForce2 (hw:0,2)
# Do not use this directly--it requires specific rate,
# channels, and format
pcm.dmix-digital {
 type dmix
 ipc_key 1235
 slave {
   pcm "digital-hw"
   period_time 0
   period_size 1024
   buffer_size 4096
   rate 48000
 }
}

# Control device (mixer, etc.) for the nForce2 card
ctl.dmix-digital {
 type hw
 card 0
}

In here, change the hw0,2 to whatever aplay -l displays.  I hopw it helps.

Jim

On Wed, 30 Mar 2005 21:06:43 -0500, Nate Thompson
<natet at buckeye-express.com> wrote:
> I was just wondering if anyone has had any luck getting their SB Live! Card
> to play a DD5.1 soundtrack via Xine using the 'Pass Thru' setting in the
> setup menu? Whenever I select this option, I only get garbled sound output.
> I'm assuming it is because I am using a very basic .asoundrc file that isn't
> configured properly. Has anyone tried to use Jarod's updated file
> (http://wilsonet.com/mythtv/asoundrc.txt) that he made for his Audigy with a
> standard SB Live! card? Any tips would definitely be apprechiated. If it
> matters, I believe I am using ALSA 1.06.
> 
> 
> Nate Thompson
> 
> 
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