In 1976, he joined Moon, who were signed to Epic Records, releasing two albums, Too Close for Comfort and Turning the Tides, and made 4 appearances on the John Peel Show.

In July 1979 Epic released a single from this album, "Ain't Nothing But a House Party", which is a disco-era reworking of The Showstoppers hit dating from 1967.

McCalla is the featured vocalist alongside saxophonist Derek Nash in this band dedicated to performing the music of Stevie Wonder.

Touring extensively in the UK the band is hugely popular and after a few years of clubs and pubs are now playing large theatres.

His fifteen-year-old son Mali Michael-McCalla competed for a place in the fifth series of the UK talent competition X-Factor in 2008, but did not progress to the Live Final stages.