I presume you mean for .mid files, as opposed to MIDI tracks in a BIAB sgu or mgu fil.

I guess you would have to first load the files into BIAB, then save as MGX (since they'll be multichannel MIDI on the melody track), and then use the command to render all to wav files


John

Laptop-HP Omen I7 Win11Pro 32GB 2x2TB, 1x4TB SSD
Desktop-ASUS-I7 Win10Pro 32GB 2x1.5TB, 2x2TB, 1x4TB SATA

BB2025/UMC404HD/Casios/Cakewalk/Reaper/Studio One/MixBus/Notion/Finale/Dorico/Noteworthy/NI/Halion/IK

http://www.sus4chord.com