In Honor of the Bohlen-Pierce Symposium, March 7-9, Boston

Rick Sacks' improvisation based on a original theme created by Peter Hannon using the Bohlen-Pierce 13-interval scale. According to others claiming (with good reason) to understand better than I, Bohlen-Pierce is an harmonic, non-octave scale. Its 13 tone steps fill the framework of the twelfth (3:1 ratio). The scale has a step size of approximately a three-quarter tone (146 cent), the middle-Eastern second degree. Help!