[mythtv-users] Strange sound problem...

Steffen Schlink goincrazy at gmx.net
Mon May 17 14:02:38 EDT 2004


Steffen Schlink schrieb:

> I have a strange sound problem...
>
> First some details:
> iP4 2.6GHz on a i865 mainboard, 512Megs, a few Gigs of harddiskspace, 
> Soundblaster Audigy 2, a WinTV 350 PVR and a cheap GeForce card.
>
> This baby runs Slackware current with a custom kernel and ALSA 
> installed  from sources. ivtv 0.1.9 works too, a cat /dev/video > 
> somefile.mpg gives me a MPEG video with sound, that plays smoothly 
> everywhere.
> Mythtv was completly installed from scratch with native support for 
> ALSA and LIRC.
>
> I'm using mythtv for about a week, nearly everything works like charm,
> except one thing: if I'm trying to view LiveTV or a recorded TVshow I 
> can't get any sound out of my box. Video plays smooth. But Mythmusic 
> gives me sound without any changes...
> Watching a recorded TVshow using mythvideo (mplayer) gives me video 
> _and_ sound.
>
> I found mplayer uses an ALSA device for sound, I tried to set 
> AudioOutputdevice in mythtv manual to ALSA:<someoutputdevice> (I tried 
> more than one!) in the database and restarted mythbackend/frontend, 
> but still no luck.
>
> mythtv uses the ALSA device (at least it says it does, there is no 
> errormessage) but I can't get sound (a simple ~$ aplay foo.wav works). 
> Same with a /dev/dsp setting for AudioOutputdevice - no sound with tv 
> related stuff.
>
> In short: sound works everywhere (music, video) except in the tv module!
>
> Someone any ideas?

It's to silly: I just had the AC3 to S/PDIF button ticked... : /

Maybe a hint for the doc's: _DON'T_ activate AC3 to S/PDIF unless you 
have a videocard that provides an AC3 stream...

Steffen




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