Born in San Francisco on January 26, 1951, North began his musical career in high school bands before forming Ambrosia in Los Angeles in 1970 with David Pack, Joe Puerta, and Burleigh Drummond. The band's debut album, released in 1975, included the track "Nice, Nice, Very Nice", and reached number 22 on the Billboard 200 chart, while the song reached number 63 on the Hot 100.
The group continued with albums like "Somewhere I've Never Travelled" (1976) and "Life Beyond L.A." (1978), reaching their highest point in the charts with "One Eighty" (1980). The latter album included hits like "Biggest Part of Me" and "You're the Only Woman (You & I)", consolidating their commercial success and earning three Grammy nominations.