I am also new to the BB and now working with OBP songs. I find if I use the Intro Fill or the Outro for the main loop, I am unable to stop the song if I happen to start the wrong one by mistake. I have found that by putting nothing in the Intro, the full song sequence in the Main Drum Loop, and a “dummy” event (low velocity and/or unused note) in the Outro, I can jump out with a double tap (I use the external switch right button) instantly if I start the wrong song or something else goes haywire.
To end the song, I add a few measures of dummy events to the end of the full song sequence. This allows me plenty of time to stop the song after the proper ending with a double tap (or again the external switch right button).
I have practiced this approach through multiple songs now and it seems to work for me. The only down side is if I forget to end the song, the main loop starts the count-in again and proceeds. Worst case, the repeated count-in reminds me to stop the song.
I prefer this approach over not being able to stop the song once it starts. Am I missing something easier?