[mythtv-users] ALSA and SPDIF Out For nForce2 Motherboards
chasejunk at optonline.net
Sat Apr 10 01:49:34 EDT 2004
I could not get the ALSA:spdif (or other ALSA: values with various
.asoundrc plugin combinations) to work in Myth. I was getting a
floating point exception. So I stuck with using OSS in Myth. As has
been pointed out, Alsa's OSS emulation uses Nforce sound device 0. This
is your line in/out. Alsa nforce device 2 (use "aplay -l" or "cat
/proc/asound/pcm" to find out for sure) is SPDIF output (the "IEC958"
device in the output of those commands) .
I set the OSS emulation to use device 2 for the /dev/adsp
In modules.conf I put:
# ALSA portion
alias char-major-116 snd
alias snd-card-0 snd-intel8x0
# module options should go here
options snd-pcm-oss adsp_map=2
# OSS/Free portion
alias char-major-14 soundcore
alias sound-slot-0 snd-intel8x0
alias sound-service-0-0 snd-mixer-oss
alias sound-service-0-1 snd-seq-oss
alias sound-service-0-3 snd-pcm-oss
alias sound-service-0-8 snd-seq-oss
alias sound-service-0-12 snd-pcm-oss
The options line does the mapping. Then in Myth : General settings I
set the audio playback device to /dev/adsp.
Initially, I also mapped /dev/dsp to device 2 (by also using dsp_map=2
on the options line above), the problem with that is that I capture
sound from Line In when recording in Myth using /dev/dsp. So with
/dev/dsp remapped to device 2 no sound was being captured from my Line In.
On 4/9/2004 4:59 PM, Mike Denver wrote:
> I've put alsa:nforce, ALSA:nforce, and alsa9:nforce, in the mythconverg
> database none seem to have any affect. Any other suggestions?
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> mythtv-users at mythtv.org
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