Kernow (Andy),

You mentioned you edited your 2011 file before rendering to MP3. Did you save the file before you rendered?

What if you try to render a 2011 file before editing? I bet it will render okay.

Try loading a 2011 song file, editing and then saving the project under a new name, for example load mysong.sgu edit and then save as mysong1.sgu.

I suspect the editing is causing a mixup between the 2011 and 2020 settings.

Something else, sometimes RealBand can straighten out a song file that decides not to work in Band-in-a-Box. Load the sgu file in RealBand and then save as a sgu file with a new name. RealBand and Band-in-a-Box use settings differently. Some settings Band-in-a-Box uses, F5 settings for example, don't get used in RealBand.

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