On Tuesday, Aug 21 2001 at 15:54:56 +0200, Peter Surda wrote:
> > I think I had the same problem... what kind of sound card do you use?
> EssMaestro 2E
Yep, that's the chip. "TerraTec DMX SoundSystem" was the card I had
problems with.
The card wasn't too well supported anyway, so I used a ALS102 card
(SoundBlaster compatible) which had not enough inputs to suit my tastes,
a solo1 whose driver killed my system from time to time (author doesn't
answer email), and now a SoundBlaster Live!. No syncing problems with
any of these.
EssMaestro 2E problems seem to be known, the driver has a way to set
the frequency manually, IIRC.
> 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.)
> 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 ;)
> 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.
Hanno
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