Try quitting and then re-launching your BeatBuddy Manager or BBMO and check if that helps with the audio.
It’s more than likely an issue with the wav file’s metadata header. This link may point you in the right direction and in particular if you are using a Mac, you will have to run your wav file through a tag stripper utility to remove that metadata. You can download and use either Tag Stripper or NCH Switch. Trouble creating a new drum set with BBManager 1.6.5.0
Link to Switch: https://www.nch.com.au/switch/switchmacu.zip
Link to Tag Stripper: Mark V Apps