Since 1991, Blackburn has been working at the American Composers Forum, where he runs Innova label and organizes various events: Sonic Circuits International Electronic Music Festival, Continental Harmony, and Bamboofest. He also produced a critically-acclaimed Harry Partch Enclosure Series at Innova Recordings in 1995–2007. Blackburn's book Enclosure Three: Harry Partch received an ASCAP Deems Taylor Award.
His environmental works appeared at harbors, state fairs, forests, sewers, art galleries and concert venues. Philip Blackburn uses various innovative and DIY objects in his performances, including brainwave sensors, dowsing rods, balloon flutes, car horns, and wind-powered harps. Blackburn staged a multimedia hyper-opera The Sun Palace about Cragmor Tuberculosis Sanatorium in Colorado Springs, which later developed into a 60-minute indie film. The premiere took place at the New York's Anthology Film Archives.
Blackburn has published articles on Vietnamese/Garifuna/Cuban music, the social dynamics of orchestral performance, and the use of sound in public art. He appeared on international TV/radio many times, such as BBC Radio 1, NPR, Minnesota Public Radio, Voice of Vietnam, KTCA, and Gannett News Service. In 2003, Philip became a Deep Listening Institute participant.