OK, that feedback is useful.

I just threw together a short song using that Style and played it, and the CPU maxed at 6 to 7% while playing.

Can you tell us more about your sound setup? Is it external / internal?

Have you tried changing WAS to MME to see if that makes any difference?

This is not a known problem as far as I am aware, but I may be incorrect.

Additionally, there is an update to Build 720 available, so you may consider upgrading, but I doubt that this is related.

I wonder if someone else can try to see what results they get?

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BIAB & RB2025 Win.(Audiophile), Sonar Platinum, Cakewalk by Bandlab, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Kontakt, Focusrite 18i20, KetronSD2, NS40M Monitors, Pioneer Active Monitors, AKG K271 Studio H'phones