[mythtv-users] Live Audio

[Russ Neufeld]

Thanks - very helpful. 
That's how my mixer was config'd and I hear the live audio, so I'll get
into the myth setup, and double check my alsa stuff. 
Something odd when I followed the Myth doc's instructions verbatim was
that "alsactl" (a la "alsactl store") wasn't a recognized command.
Perhaps upgrading (when I was originally trying to troubleshoot this
problem) messed something up? I'm running alsa 1.0.4...
Anyway, I'll see if I can sort out the final step/stage in the audio
chain. Thanks for the assistance so far...

Russ

On Wed, 2004-04-21 at 21:17, Bruce Markey wrote:
> Russ Neufeld wrote:
> > Thanks - I've read through all that stuff, and I'm quite sure my ALSA
> > drivers are working correctly. However, perhaps it's changed or unknown
> > language/terminology that's throwing me off...
> > 
> > My on-board Realtek ALC650 audio has a lot of controls I'm not sure of,
> > and I'm a little confused by the CAPTUR part of the audio
> > troubleshooter. Is that just referring to which source I check the
> > "Rec." option (Gnome ALSA mixer) for, or is that something else I missed
> > somewhere? I have a Capture mixer and it's 100%. Checking or unchecking
> > the "Rec." option doesn't seem to matter.
> 
> Yes, it is a little confusing which is why hundreds of people
> have been down this road before you. First, use "alsamixer"
> from the command line so that we're talking about the same
> thing =). Next, realize that the "CAPTUR" above the slider
> to indicate which pair of things is involved in recording is
> different than "Capture" below the slider that controls the
> recording level. When you have this set right it should look
> something like this. 
> 
>                       CAPTUR      CAPTUR
>  +--+        +--+     L+MM+R      L+--+R
>  |  |        |  |      |  |        |  |
>  |  |        |  |      |  |        |  |
>  |##|        |##|      |  |        |##|
>  |##|        |##|      |  |        |##|
>  |##|        |##|      |  |        |##|
>  |##|        |##|      |  |        |##|
>  |##|        |##|      |  |        |##|
>  |##|        |##|      |  |        |##|
>  |##|        |##|      |  |        |##|
>  |##|        |##|      |  |        |##|
>  +--+        +--+      +--+        +--+
> Master  ...  PCM  ...  Line  ... <Capture>
> 
> This assumes that the patch cable from the line-out of the
> TV card is plugged into the "Line" in for your sound card.
> 
> If Line was unmuted (by pressing "M") and the volume was turned
> up, you should hear the realtime pass through sound. Of course,
> you don't want to hear that while you are recording with myth.
> Note that "Line" is marked for "CAPTUR" (by pressing "Space")
> to indicate that it is the source for capture and the Capture
> slider controls the volume of the recording.
> 
> If you still don't hear sound, plug speakers or headphones
> directly into the line out of the TV card. If you don't hear
> sound then there is either a bttv driver problem or you have a
> defective card.
> 
> If you do have audio, plug the patch cable back in, unmute and
> turn up Line and make sure that Master and PCM are unmuted and
> turned up. If not, you may have a bad patch cable, ALSA driver
> problem or a sound card with a bad Line jack or a defective DSP.
> 
> If you do hear the realtime sound but can't record with myth,
> run myth's "setup" program and in Capture Cards make sure you
> set the correct /dev/dsp* . Run mythfrontend and go to Setup->
> TV Settings->Recording Profiles and check your settings for
> LiveTV. 
> 
> Next, start the backend from a commandline and start the
> frontend form another then go to Live TV If there is no
> sound, check the console messages for both the front and
> backend.
> 
> --  bjm
> 
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