Real-Time Improvisation by David K. Barton & Boyd Nutting, recorded Saptember 19, 2019, PLATO’s Studio, Michiana. David: PLATO, No. 0309, “Equinoctial Halcyon, part 1” (David & Boyd, 9-19-91) 00:00-12:00. Boyd: Theremin+Vocoders; PLATO, No. 0309, “Equinoctial Halcyon, part 1” (David & Boyd, 9-19-91) 00:00-13:00; PLATO, No. 2825, “The Alchemy of Eternity” (David, Boyd & Jeff, 9-19-13) 00:00-13:00, 21:44-34:44.