New York-based composer Michael Harrison (1958) focused his main works on the piano, particularly on the "harmonically-tuned piano" or "harmonic piano," a customized grand piano that can alternate between two different tunings (basically an evolution of Young's "well-tempered piano").

From 1978 till 1996 Harrison took lessons of North Indian classical singing with Pandit Pran Nath, and throughout the 1980s he worked on "just intonation" with La Monte Young.

Thus the intense and subtle harmonic-piano solos of In Flight (Fortuna, 1987), which contains eight brief compositions, From Ancient Worlds (New Albion, 1992), which contains the 22-minute six-movement Quest For The Rose, the 18-minute three-movement The Garden Of Avalon and the 22-minute Land Of The Rose, and Revelation (Harrison, 2001 - Cantaloupe, 2009) , a 72-minute solo recorded live. He customized the piano according to his own method of tuning, that he calls "pure intonation".

Harrison also composed Symphonic Cortege (1992) for orchestra, and recorded The Crystal Flame (1980) for piano, violin and bass.

Other compositions include: Tone Clouds (2009) for string quartet and just intonation piano, the string quartet Chant (2012), Tessellations (2014) for chamber orchestra, countertenor, tenor, tabla and tamboura, Orchestral Modules (2014) for chamber orchestra, Just Constellations (2015) for vocal octet, Bairagi Bhairav (2017) for just intonation piano, Indian vocals, tabla, and optional tanpura, the cello octet Just Ancient Loops (2018), Time Cycles (2019), Mureed for string quartet (2019), Constitution (2019) for chamber ensemble, etc.

Harrison died in 2026.