[mythtv-users] Onboard sound full-duplex ?

[Isaac Richards]

On Wednesday 13 October 2004 03:06 pm, Maarten wrote:
> On Wednesday 13 October 2004 20:28, Isaac Richards wrote:
> > On Wednesday 13 October 2004 02:11 pm, Maarten wrote:
> > > On Wednesday 13 October 2004 19:29, Tim Sailer wrote:
> > > > On Wed, Oct 13, 2004 at 07:03:18PM +0200, Maarten wrote:
> > > >
> > > > Card 1 being the first capture card or the first sound card? You
> > > > specify the audio device for playback, so you can always play out
> > > > through the builtin device.
> > >
> > > With card_1 I meant the first capture card, not the first soundcard. 
> > > But I don't really think that makes any difference; you'll have two
> > > combos of <<capture card + connected soundcard>>.  And if one of those
> > > combos lack full-duplex, it will not be able to playback (or -worse- it
> > > could fsck up the ongoing recording when selecting it for playback).
> >
> > Why would you be using multiple soundcards for playback?
>
> Hm.  Okay, so maybe I'm confused, but I need a soundcard each for each
> BT8x8 capture card, right ?  So either both those soundcards need to be
> able to do full-duplex (otherwise live TV and playback will have no sound)
> OR one must have the possibility within mythtv to declare one card capable
> of recording and playback, and the other capable of _only_ recording. (And
> mythtv reacting accordingly...)  Is this assumption correct so far ?
> Note that I'm _not_ talking about PVR250 cards, but about BT8x8 cards.

You're  not even close to being correct.   Why would you be using more than 
one sound card for _playback_?  Why would you think that the device used to 
playback audio is tied in any way to the device used to record audio?

Isaac