This concert showcases the musical partnership of Pauline Oliveros (1932–2016) and Terry Riley (1935– ) through the lens of time-delay techniques. It features the world premiere performance of Oliveros’s The C(s) for Once (1966) for flutes, voices, trumpets and tape delay system, followed by Riley’s Keyboard Study #1 (1965), Oliveros’s piano solo dedicated to Riley, A Trilling Piece for Terry (2015), and correlated works by James Tenney and J.S. Bach. The program concludes with a performance using the digital version of Oliveros’s Expanded Instrument System (designed by Oliveros, 1965–2016).