I believe what you describe is actually a "feature". Rendered files are saved to the same directory with the same name as the song file. That is what you have apparently discovered. This is a means to have more tracks and more instruments playing via the wav file along with you BIAB file. If you don't want that be sure to render to a different location. That should fix it.

Bottom line: if BIAB sees a wave file of the same name as the BIAB file in the same directory it will play both.

Last edited by MusicStudent; 12/08/17 06:47 AM.
BIAB – 2025, Reaper (current), i7-12700F Processor, 32GB DDR4-3200MHz RAM, 1TB WD Black NVMe SSD, 2TB WDC Blue SSD, 1TB WD Blue, 2 TB SK NVMe, 6 TB External, Motu Audio Express 6x6