Hugh,

I have used Reaper for a number of years now. It's excellent software. It sounds like you might have saved the audio file with acidized information and that Reaper's tempo is set differently from RB's tempo.

To test this theory.... under "Project Settings" in Reaper, set the project's tempo (BPM) and Time Signature to be exactly the same as tempo in Realband. To do this, follow the 1, 2, 3, 4 on the below image.

Does this help?

Regards,
Noel

P.S. If you click on the 'Audios on Soundcloud' link in my signature you can hear some of my songs. All these have audio tracks sent from both Realband and BIAB to Reaper.

Attached Files (Click to download or enlarge) (Only available when you are logged in)
Project settings 1.JPG (48.2 KB, 54 downloads)

MY SONGS...
Audiophile BIAB 2024