By 1968 he was playing bass guitar and sang backing vocals in Edmunds' first major group, Love Sculpture, best remembered for their 1968 top ten hit single "Sabre Dance".
After Love Sculpture split in 1970 he concentrated on studio and session work, songwriting and engineering, as well as collaborating with Edmunds on his number one single "I Hear You Knocking", playing bass, piano, and percussion.
In 1975, David played bass guitar and did some backing vocals on Andy Fairweather Low's album, La Booga Rooga.
[2] In the mid-1970s, David formed a group, Airwaves, along with singer and guitarist Ray Martinez and drummer Dave Charles.
The song "So Hard Living Without You" got significant airplay in America and peaked at number 62 on the Billboard Hot 100 that same year.