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VariSpeed and Timestamps

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VariSpeed and Timestamps

Subject: VariSpeed and Timestamps
From: Ethan Funk <email@hidden>
Date: Wed, 17 Nov 2004 08:47:39 -0700

If I call AudioUnitRender to get a sample buffer from a VariSpeed audio unit, passing it my local sample time stamp, what time stamp will the VariSpeed AU pass along to it's render call back when it pull on the next unit in the chain (a ring buffer in my case)? Will it just pass along my time stamp? Does it used my time stamp multiplied/divided by the rate convertion scalar? Does it have it's own internal input sample counter that it uses?

I am having trouble where the resuling audio sounds modulated by a square wave at around the render period rate which makes me suspect the the time stamps are skipping through ring buffer when the VariSpeed filter pulls on it.

Thanks,
Ethan....

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