SPDIF audio out on nForce4 MOBO not working
 

I've followed a few links discussing how to get this working - but unfortunately with no joy. Please excuse my completel N00bness - but hey I'm trying!!

when I try and test a sound I get this:
[root@wallace-linux ~]# aplay /usr/share/sounds/KDE_Startup.wav
ALSA lib conf.c:1592:(snd_config_load1) _toplevel_:51:23:No such file or directory
ALSA lib conf.c:2837:(snd_config_hook_load) /etc/alsa/cards/aliases.conf may be old or corrupted: consider to remove or fix it
ALSA lib conf.c:2700:(snd_config_hooks_call) function snd_config_hook_load returned error: No such file or directory
ALSA lib pcm.c:1969:(snd_pcm_open_conf) Invalid type for PCM default definition (id: default, value: cards.pcm.default)
aplay: main:544: audio open error: Invalid argument


Now thats a bit of a mystery to me - but as far as I can gather the crux of this matter is to do with 2 files. The first is modprobe.conf - which after installing nvidia drivers an then reading that the default intel8x0 drivers should be fine for my needs is - is atsrting to look a bit messy (sorry) and the second .asoundrc.conf. (extracts shown below)

Can anyone see where I've gone wrong? FYI I checked that AC97 audio is enabled in systems bios and that the ASLA mixer has the 'IEC958 Playback AC97-SPSA' value set to 0 (which seem to have caught out alot of people)

I think I've stuffed up something fairly fundamental - but can anyone see where?? or point me in a good direction?
Interestingly enough when the machine boots - I do see a nice little "PCM" indicator light up on my Yamaha AV Reciever - so it knows somethings there!

Thanks!!



[mythtv@wallace-linux ~]$ cat /etc/modprobe.conf
alias eth0 forcedeth
alias scsi_hostadapter sata_nv
alias snd-card-0 snd-intel8x0
#alias snd-card-0 nvsound
#alias snd-intel8x0 off
alias nvsound off
alias i810_audio off
options snd-card-0 index=0
options snd-intel8x0 index=0
install snd-intel8x0 /sbin/modprobe --ignore-install snd-intel8x0 && /usr/sbin/alsact1 restore >/dev/null 2>1 || :
remove snd-intel8x0 { /usr/sbin/alsactl store 0 >/dev/null 2>&1 || : ; }; /sbin/modprobe -r --ignore-remove snd-intel8x0
#install nvsound /sbin/modprobe --ignore-install nvsound ; sleep 1; /usr/bin/nvmix-reg -f /etc/nvmixrc -L >/dev/null 2>1 || :
#remove nvsound { /usr/bin/nvmix-reg -f /etc/nvmixrc -S >/dev/null 2>&1 || : ; }; /sbin/modprobe -r --ignore-remove nvsound
alias char-major-81 bttv
alias usb-controller ehci-hcd
alias usb-controller1 ohci-hcd
alias ieee1394-controller ohci1394
# nvidia kernel module
alias char-major-195 nvidia-1_0-7667
alias nvidia nvidia-1_0-7667


[root@wallace-linux /]# cat /home/mythtv/.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 nForce2/4 (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 nForce2/4
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
# nForce2/4 (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 nForce2/4 card
ctl.analog-hw {
type hw
card 0
}

# Alias for digital (S/PDIF) output on the nForce2/4 (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 nForce2/4 card
ctl.digital-hw {
type hw
card 0
}

# Direct software mixing plugin for analog output on
# the nForce2/4 (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 nForce2/4 card
ctl.dmix-analog {
type hw
card 0
}

# Direct software mixing plugin for digital (S/PDIF) output
# on the nForce2/4 (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 nForce2/4 card
ctl.dmix-digital {
type hw
card 0
}