Multicore/Multiprocessor Support results in crackling audio.
I've been struggling with a crackling audio in Live for a while. After doing extensive testing it turned out to be related to the Live option Multicore/Multiprocessor Support. I've always turned this on without thinking about it but when I tried to turn it off all strange sound artifacts disappeared.
Before changing this I could *almost* get away from the audio problems by putting my ASIO buffer latency to at least 50ms (Live reports that to be 2048 samples).
When I turn multicore off I can set the same latency to 2ms (at least while doing the same test I did in the above scenario) and it works like a charm.
I have a reasonably beefy CPU so one core should go a long way, but it sure would be swell if I could turn on multicore again.
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