Bob,

I've been using Reaper with BIAB since version 3. I've never come across the problem that you've encountered. There's always been a perfect match between BIAB and Reaper tempo settings.

For me, the tempo in Reaper has no effect on how fast the song plays. All it does is to align the bars in Reaper with the correct locations in the music from BIAB. It sounds like you have some option engaged that I do not.

In solidrock's above image, I wonder if you've activated "Force the project tempo/time signature to occur on whole samples" (just above BPM)?


Another possibility that I've just discovered is found under the media tab in the "Project Settings"...

Follow the 1, 2, 3 on the image below and see if "Embed Project Tempo" is active... if so, deactivate it.




My last thought is to double-check that the playback rate is set to "1"... see the image below. While this is varied by the slider I've highlighted, it's also possible to simply type in a value.




Let us know if any of the above solves the problem.

Regards,
Noel

MY SONGS...
Audiophile BIAB 2025