[fractallyte]

Actually B&P wasn't open sourced for many years after the Blue Ribbon Soundworks acquisition. During this time, B&P was in limbo: the most powerful MIDI sequencer on the Amiga, locked up by Microsoft. The source code was only released when Microsoft decided it had no value to them.

After this there was a flurry of activity: Alfred Faust took up development, the manuals were scanned, and it all continued from there.