[mythtv-users] Re: ALSA and .asoundrc help

[David W Davis]

Actually, I do get sound from mythmovie with the mplayer lauch command
"-ac hwac3, %s".  Although, this only gives me sound on my files with
ac3 support.  Others have no sound.  I've gotten rid of the skips in
XMMS by configuring my ALSA output device to IEC958 hw 1,2.  Is this
what I need to change in my .asoundrc?  I changed all the instances of
card 0 to card  1 and all references I saw to hw 0,0 or whatever were
in comments.  At least I'm making some progress.....  Still no sound
with mythmusic or live or recorded tv though....


On Tue, 14 Dec 2004 01:06:14 -0500, David W Davis
<davidw.davis at gmail.com> wrote:
> 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.
>