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0e1f616
(Get the code!)
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The CPU meter is actually the "audio latency usage" and only partially related to the er overall CPU load. The audio buffer can only processed by a single core that's why the CPU frequency is more important than the number of cores. By default, we have no control what else this core has to do. That's why we normalize the value to 25 %, for some headroom. This was tested on the worst case machine, a single core CPU with hyperthreading enabled, to provide a certain reliability of the meter.
On your 8 core CPU, this is probably too pessimistic but still valid.
By the way, we have a branch where you can reserve a single CPU for audio.
https:/