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Old 09-30-2010, 12:41 PM
Postman Postman is offline
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Join Date: Dec 1999
Location: where land meets sky
Posts: 2,375
Default Re: Pro Tools cannot play. Network clock is not locked.

I'm pretty sure there is some time-stamping of data as it goes between satellite systems. Without time stamping I don't see how playback can be sample accurate when network latencies are variable and unknown. I believe it is a more certain protocol than one that simply says, "okay everyone, start playback right now!". Instead, the message is probably more like, "okay everyone, go to sample number xxxxxxx and start playback on clock tick number xxxxxxxx."

Also, realtime data exchange should be done using a common clock so there is no data overrun or underrun. The network's clock can be used to synchronize the exchange of data.

And that's about all I know of it except that the message pops up here on rare occasions, like when I overslept and the client is due any second as I'm rushing to get everything booted and ready. I just reboot the PT and Avid machines and the problem is fixed. I only remember one time it popped up during a session, and it fixed itself after a few seconds.
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