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kennedyb4
post Oct 4 2001, 13:12
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I have beene reading a little about sync problems when capturing pcm streams via spdif out/in on computer.

Something about different clock speeds. In video we used to genlock two devices to prevent this.

Is there any type of soundcard or equipment that can minimize/eliminate this problem?

And how audible is the problem anyway?
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eusagc
post Oct 4 2001, 17:06
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QUOTE
Originally posted by kennedyb4
I have beene reading a little about sync problems when capturing pcm streams via spdif out/in on computer.

Something about different clock speeds. In video we used to genlock two devices to prevent this.

Is there any type of soundcard or equipment that can minimize/eliminate this problem?

And how audible is the problem anyway?


keneddyb4,

you have to slave your devices to a master clock source to avoid drifts in clocking. there are some nice products from steinberg, apogee, and aardvark. they're called sync devices. here's aardvark's: http://www.aardvark-pro.com/sync.html

how audible? well, if the dirft is appreciable enough, you'll get crackles/pops at most likely regular intervals, after so-so seconds.

david (robinson) has always recommended this read, by mastering guru bob katz: http://www.digido.com/jitteressay.html

cheers,

albert smile.gif
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Pio2001
post Oct 4 2001, 20:42
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QUOTE
Originally posted by kennedyb4
I have beene reading a little about sync problems when capturing pcm streams via spdif out/in on computer.

Is there any type of soundcard or equipment that can minimize/eliminate this problem?


The recent 24/96 soundcards (Marian Marc 2, Maudio Audiophile 2496, Terratec EWX2496, Echo Mia, Hoontech DSP, I don't know about the new Creative) can slave their clock to the incoming SPDIF stream.

QUOTE
Originally posted by kennedyb4
And how audible is the problem anyway?


Other soundcards resample their input, spoiling the sound. It sounds a little dull. Like with a 200 CD player. As I don't monitor, I don't know about sync problems. The soundcards mentioned above have usually asio drivers (low latency).
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eusagc
post Oct 4 2001, 22:02
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hey pio, nice to see you here, dude! smile.gif

cheers,

albert
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