Hey Massichat,

It's actually quite simple, and I cover this issue at the point timestamped in this link: https://youtu.be/hUKGWZhJ2vo?t=236

It's very important that you set the tempo in the project settings as i have shown, otherwise Reaper, in its default settings will stretch the audio if you adjust the tempo via the transport bar rather than in the project settings as shown in the video.

Please let me know if this addresses your issue.

All the best,

DB09


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