I was looking at RubberBand command line for stretching items to fit a tempo map as I have been using the the RubberBand app for years that works great.
I just found in the release note for 1222 you have it already
+ Rubber Band Library: fix timing issues with tempo ramps and/or 0ms fade-times
I tried the command line and it was totally smooth across the tempo markers like other DAWs
See in the video demo:
track 1 stretch markers
track 2 rubberband
track 3 original
https://www.dropbox.com/s/u9arbborrb...rBand.mp4?dl=0
Can you add this option to Reaper to use this instead of those jerky stretch markers ? if you have plans to fix the issue please let me know else I will have to make a script to do this automatically
https://forum.cockos.com/showthread....99#post2221299