[mythtv-users] ALSA and .asoundrc help
David W Davis
davidw.davis at gmail.com
Tue Dec 14 06:06:14 UTC 2004
So I am attempting to get the SPDIF working on my nforce2 mb. I
followed the mythtv.info tutorial and created my .asoundrc. When I
run aplay -l I get:
**** List of PLAYBACK Hardware Devices ****
card 0: M410 [M Audio Delta 410], device 0: ICE1712 multi [ICE1712 multi]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: nForce2 [NVidia nForce2], device 0: Intel ICH [NVidia nForce2]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: nForce2 [NVidia nForce2], device 2: Intel ICH - IEC958 [NVidia
nForce2 - IEC958]
Subdevices: 1/1
Subdevice #0: subdevice #0
This leads me to edit all references of card 0 to card 1 in my
.asoundrc. I can successfully run aplay -D default, but don't hear
anything. When I attempt to run aplay -D mixed-digital (or anything
else) I get the error :
ALSA lib pcm.c:1975:(snd_pcm_open_noupdate) Unknown PCM mixed-digital
aplay: main:508: audio open error: No such file or directory
I can play mp3s with XMMS using the ALSA output plugin configured to
the default device. I hear output doing this, but have had mp3s
randomly stop playing (not sure if that is an XMMS or file issue). So
I am not getting any sound in MythTV regardless of what the output is
selected. Anyone have any ideas or places I should look? Here is my
.asoundrc:
# 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 1 #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 1 #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 1 #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 1 #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 1 #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 1 #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 1 #0
device 2
}
# Control device (mixer, etc.) for the nForce2 card
ctl.digital-hw {
type hw
card 1 #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 1 #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-analog {
type hw
card 1 #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 1 #0
}
Thanks.
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