If you need to play back the score without DrumBurp – perhaps you’re giving someone a backing track to practise to – you can export a standalone MIDI file containing the song. Click the Export MIDI button on the MIDI toolbar:
A dialog will open asking where you want to save the MIDI file. Choose a filename and DrumBurp will write MIDI corresponding to your score to that file. You can play it back in any MIDI player.