Stewart was the brother of
John Stewart (1939–2008), a one-time member of
The Kingston Trio and later a successful singer-songwriter, and the father of
Jamie Stewart, frontperson of the
avant-garde group
Xiu Xiu. We Five, known for their relatively complex harmonies, released "
You Were on My Mind", which reached No. 1 in
Cashbox and No. 3 on the
Billboard Hot 100, and We Five received a best new group Grammy nomination. The next year, they had a Top 40 hit with "Let's Get Together." He left the music industry in the early 1990s and became a computer programmer. He designed systems for Digidesigns and for Adobe for use by musicians and arrangers. His technological creations include the Session8 Digital Audio Workstation for PC, the Impulse Drum Trigger, the Feel Factory, co-designed with
George Daly, and the Human Clock, which instructs computerized musical devices to follow a human tempo. He later played bass in his child's band The Indestructible Beat of Palo Alto (
IBOPA). ==Death==