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1b1ed1a
(Get the code!)
> The reason might not only be CPU utilization but also disk I/O. I experience buffer underflows while performing rsync operations on unrelated disks, CPU is not an issue here.
Uwe, did you check that it was a buffer underflow (Mixxx callback exceeds its deadline) or is it just a CachingReader cache miss? CachingReader is supposed to be able to cache miss and emit silence so that it doesn't block the rest of the callback. No file I/O should be happening in the callback so I don't see how disk I/O could cause xruns?