That band eventually became the Hombres, which scored a chart hit with "Let It All Hang Out" in 1967.
After the Hombres' career slowed, Cunningham went to work behind the scenes at the famed Sounds of Memphis Studios. In 1971, he moved to Los Angeles where he served as chief engineer at Independent Recorders, working with the likes of Billy Joel, Elton John, and Lou Rawls.
Cunningham ultimately returned to Memphis a few years later and launched his own studio.
He had been a member of Lewis' band since 1997. His solo album, "Hangin' In," was released in 2003.