I have tried several things in the night, but was too tired to report my findings.

You can change the key of the loop as soon as you have a valid text-file like this one here for example: Funk - gl_funk100q ev16_AcidInfo.txt

I haven't looked too intensively to find information about them. But, all files provided by PGMusic have it and my other loop files didn't. So I created one -- I copied one and changed the data I knew were different. Then the key changed according to the preset in the BIAB music file.

There was a bit of trial and error to have it sounding the way I intended, but I did get it to work.


Desktop; i7-2600k, 8 GB mem., Win 10 Pro, BIAB 2017; RB 2017 - latest build
Laptop: i5-2410M, 4 GB mem, Win 10 Pro, BIAB 2017; RB 2017 - latest build