It's nothing you can control. When apps/instruments take advantage of multicore support, the OS distributes the load among the cores.

Kontakt can allow you to specify the number of cores but such apps are rare.


BIAB 2024 Audiophile Mac
24Core/60CoreGPU M2 MacStudioUltra/8TB/192GB Sequoia, M1 MBAir, 2012 MBP
Digital Performer11, LogicPro, Finale27/Dorico/Encore/SmartScorePro64/Notion6 /Overture5