[mythtv-users] Audio - PCM, Master

[Claude Gélinas agr.]

Le vendredi 03 mars 2006 à 22:32 -0500, Michael T. Dean a écrit :
> On 03/03/2006 08:01 PM, R wrote:
> > In MthTV we have:
> > MythTV->Main->Utilities->Setup->General->Audio->Mixer Controls-> PCM or Master
> >
> > In Fedora Core 4 we have:
> > KMenu->Sound & Video-KMix->Current Mixer->Input->PCM
> >
> > Pardon my ignorance.
> >
> > What is PCM?
> >   
> 
> In short, it's similar to what Windows calls "Wave" (or "Wav"?).  
> Technically, it's Pulse-Code Modulation
> 
> > What is the difference between PCM and Master?
> >   
> 
> Master typically controls the volume across multiple controls (including 
> CD and PCM and ...).  However, note that on some sound cards, it does 
> *not* affect surround volumes (i.e. Center, Surround, LFE).
> 
> If you can't tell a difference in functionality on your system, it 
> doesn't matter which you use.  However, it's often nice to make sure you 
> set Myth to use the same controls used by other applications (like xine 
> or MPlayer) otherwise, you'll end up adjusting Master in one then PCM in 
> others, so where you leave one and enter another determines the maximum 
> volume range you have available...  (I.e. don't let apps "fight" each 
> other or you'll constantly be using external programs, like alsamixer, 
> to "reset" your volumes.)
> 
I've pvr350 with sound out plugged in the line in of my sound card. That
way I get the sound in my small speaker but I need to use the master
control and mute the pcm

Ifthe pcm is not muted I get a lot of pulsed noise over the tv sound in
my speaker.

Can I unplug the cable from the pvr card to the sound card and get the
sound via another way. 

also what is the problem with the pcm and how can i remove the noise.
Xine is set to use pcm and it's a problem having to use alsamixer to
mute the pcm each time I quit xine.

what is the solution ?
-- 
-----
Claude Gélinas agr., dta
Phyto Ressources inc.
==============================================================================
Varennes, Québec, Canada           Tél.: (450) 652 9764,   Fax.:(450) 652 6182
     Des questions sur les insectes et maladies des plantes ornementales ?
                 Want to know more about ornamental plant pest ?
                            http://www.phyto.qc.ca