Real-Time Improvisation by David K. Barton, recorded February 16, 2019, PLATO’s Pilot House, Michiana. From 00:08 to 26:08, and from 45:52 to 72:52 of PLATO, No. 1533, “Measured and Unmeasured Tones”, (David, Marie Fryar, & Valerie Rumpf, 2-16-2007).