Thresholds 1976.  A snappy percussion study, handcrafted in 3M vinyl tape, using manual splicing and Ampex recording machines.  4 minutes, for 2 channel audio.  Composed in analog media the University of Michigan Electronic Music Studio. Premiered by the University of Michigan Contemporary Music Players in Rackham Auditorium.  Ann Arbor, MI.  December 1976. Numerous additional live and radio performances. Contact me to get a copy.