Thread: Aux Sends causing high CPU usage PT 2021.6/higher with Apple Silicon [FIXED 2022.5]
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Old 04-27-2022, 04:19 PM
Darryl Ramm Darryl Ramm is offline
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Default Re: Aux Sends Causing High CPU Usage - Pro Tools 2021.6 and Higher With Apple Silicon
Just a negative confirmation on Intel.

Pro Tools Studio 2022.4 on MacBook Pro 2019 15" running Big Sur, just hums along like a dream. IO buffer size has no effect on CPU use, and I do not expect it to because it's using the fixed size disk IO playback buffer.

Mmm 2021.6 introduce a lot of changes including hybrid engine so hopefully what broke will be easy to find.

One thing you could try is changing the IO buffer size and if that has a radical effect it points suspicion that something got gooched with the disk playback buffer. If I was digging deeper as a developer I'd want to confirm processor affinity is working as expected.

Thanks for finding this and sharing the test session. You should post any relevant support case number here and folks can hopefully make sure it gets attention.
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