On Tue, Aug 21, 2001 at 04:27:10PM +0200, Hanno Foest wrote:
> On Tuesday, Aug 21 2001 at 15:54:56 +0200, Peter Surda wrote:
> > EssMaestro 2E
> Yep, that's the chip. "TerraTec DMX SoundSystem" was the card I had
> problems with.
aha
> > Note to developers (Zdenek baaaaad :-)) If you read Linux Audio Quality Howto,
> > you'll read that, except for expensive professional cards, the frequency of
> > the card's clock varies very much. This is caused by the fact that the card's
> > crystal can't sync to any outer clocks. This also means that if you
> > simultaneously play sounds with 2 sound cards, they will drift out of sync.
> Um, how often does that happen? (I'm not running a studio.)
Always. Just try it.
> > Therefore, syncing audio to realtime is WRONG, because in most case it will
> > produce crap.
> Syncing the video playback to the sound clock, especially one which is
> noticeably off, doesn't seem to be very convincing either ;)
Well, the difference is smaller than between watching movie in cinema and on
TV (24 vs 25 fps).
> > As fluentness of audio output is important, I only see 2 possibitlities:
> > resample audio to match soundcards clock, or sync to card's clock. I'd go for
> > the second one and will post a patch soon.
> Guess why the resampling option in avifile was added? - Syncing to the
> sound clock is the old behaviour which Zdenek didn't like.
But in that case you have to resample audio, because otherwise you'll get out
of sync.
> Hanno
Bye,
Peter Surda (Shurdeek) <[EMAIL PROTECTED]>, ICQ 10236103, +436505122023
--
Where do you think you're going today?
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