Originally Posted by musocity
"Very simple. I mean how much simpler can you get than that?"
100 times more simpler and quicker.

I assume if you don't have the Audiophile Edition of Biab it will be wma
so in the script:
default_tracks_dir = "D:\\Music\\BIAB\\RealTracks\\" --(for Win use \\, for Mac use / :default directory for RealTracks wav files
default_drums_dir = "D:\\Music\\BIAB\\Drums\\" --(for Win use \\, for Mac use / :default directory for RealDrums wav files
file_type = ".wma"

If you are using wma you will need Reaper v6.57 or later.

OK thanks Muso, I've got it working now.
I'll have to try it out on a bunch of files in the next little while and see how much time I save with it.
I commend you on all the work you put in to make this script! smile
Congrats!

A BIAB user for more than 30 years (if you can believe it) !