[mythtv-users] Alsa SPDIF NForce4
Timothy Bish
tabish at twcny.rr.com
Tue Aug 15 23:06:33 UTC 2006
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Timothy Bish wrote:
> > Need a little help getting ALSA to output everything to SPDIF, currently
> I
> > get nothing.
>
> After having tried previously and given up, I gave onboard S/PDIF another
> shot
> last night. I updated the kernel to the latest and greatest and went over
> some
> of the other messages in this thread.
>
> Try the following:
>
> 1) Delete /etc/asound.conf, if present...you don't need it.
> 2) In alsamixer, make sure these settings are as follows:
> IEC958: unmuted
> IEC958 Playback AC97-SPSA: 0%
> IEC958 Playback Source: PCM
> PCM: unmuted (level shouldn't matter, but mine is at 77%)
> Master: unmuted (level shouldn't matter, but mine is at 77%)
> 3) Test PCM audio:
> aplay /dev/urandom
> You should get white noise.
> 4) Test AC3 passthrough:
> mplayer -ao alsa -ac hwac3, dvd://
>
Sweet with this straightforward info and some additional playing around I
was able to get everything working. Thanks.
> One annoyance I found while watching something with an AC3 soundtrack last
> night was that in one hour, the stream glitched somehow and was
> interrupted a
> couple or three times. With my receiver, that translates to a couple of
> seconds of silence as it switches from AC3 to PCM mode and back to AC3
> mode. I
> had the MythTV audio device set to ALSA:default, but I'm going to try
> again
> with it set to /dev/dsp. That should go through kernel-space OSS
> emulation.
> If it plays an hour or two without the receiver doing weird things, I'll
> consider my nForce S/PDIF problems fixed. If not, I'll just switch back
> to the
> USB S/PDIF dongle I've been using and forget that I have an onboard
> output. :-P
>
> (I had this same occasional AC3 dropout problem with the nForce2 I was
> using
> previously, and had never figured out a fix for it.)
>
> _/_
> / v \ Scott Alfter
> (IIGS( http://alfter.us/ Top-posting!
> \_^_/ rm -rf /bin/laden >What's the most annoying thing on
> Usenet?
>
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.2.1 (Cygwin)
> Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org
>
> iD8DBQFE4RNPVgTKos01OwkRAvjuAJ9CrkJn/fshZ+mYwNN4r0aly8haPQCg0F+g
> Az314U0wz57tf1m/ClfehqQ=
> =bHsH
> -----END PGP SIGNATURE-----
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
More information about the mythtv-users
mailing list