Currently, the Soundbrenner Pulse Metronome is not compatible with OnSong. We are in the process of trying to integrate Soundbrenner's Ableton Live SDK into OnSong, but there are some technical bugs that we are running into. We’ve contacted and reached out to Ableton for assistance, and they are currently reviewing what the problem is. We have also reached out to Soundbrenner and are working closely with them in establishing what the issue might be and how to remedy it.
That being said, we do hope and plan on making the Soundbrenner compatible with OnSong in the near future.