Music is the artform where the past, the present and the future meets. The german composer Bernd Alois Zimmermann (1918-70) called it «the spherical form of time». It contains the synchronity of memories, longing, lament, anger, pain and expectation. Allan Peterson (1911-80) put it this way:  «The composition I ́m working on is my own life, the blessed and cursed: To rediscover the song the soul once sung».