This double-CD reissue features music originally contained on two albums of extended pieces recorded in 1973 and 1983 respectively. Meditation consists of two reflective works for synthesizers. On Sky Music – Mountain Music, however, he creates delicate, transparent soundscapes from more natural sources, though it was actually created by attaching tuned whistles to carrier pigeons and allowing the birds to fly through air currents generated by BMW’s wind tunnel. – Linda Kohanov