+1 Excellent suggestion and idea for both Band-in-a-Box and RealBand. However, PG Music may already be spreading the workload among multiple cpu cores.

As a test I loaded the RealStyle _Crooner1.STY Crooner Big Band w/9-Part Horns. I set Windows Task Manager to display cpu loads and pressed the regenerate button.

As you can see from the screen shot below, each of the four cores in my i3 cpu are working.

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Jim Fogle - 2025 BiaB (Build 1128) RB (Build 5) - Ultra+ PAK
DAWs: Cakewalk Sonar - Standalone: Zoom MRS-8
Laptop: i3 Win 10, 8GB ram 500GB HDD
Desktop: i7 Win 11, 12GB ram 256GB SSD, 4 TB HDD
Music at: https://fogle622.wix.com/fogle622-audio-home