Phil was an early experimenter in the computer music field. He started with building home brew analog and digital synthesizers in the late 70's and early 80's. He then co-developed the Hierarchical Music Specification Language (HMSL) in the 1980's which featured abstract algorithmic composition and real-time DSP synthesis. Phil then designed and developed the first DSP based game audio system while at 3DO in the early-90's. More recently he has worked on JSyn, PortAudio, the WebDrum, Sony PS3, and developed a MIDI ringtone synthesizer for the mobile phone industry. He has been working for several years with the MMA on next generation MIDI protocols and serves on their Exec Board.