Back in 1978, right before rap started to take over the world, an aspiring filmmaker named Andrew Davis — who would later go on to direct “Under Siege” and “The Fugitive” — managed to scrape together the money for this (in several senses of the word) funky feature about an aspiring Chicago band trying to scrape together a career. There are two white guys — Richie (Richie Davis, the director's brother) and Harold (George Englund, son of Cloris Leachman) — but the rest of the band is black. So is the music, which is funk/soul/R&B; think Tower of Power and Earth Wind and Fire. Their mentor is sax player Percy (Gene Barge, best known for his work with Gary Bonds).
The script is pretty much a loose collection of elements used before and since for aspiring-musician movies. But, despite — or maybe because of — some ragged acting and rough production values, it has an undeniable energy and a realistic sense of time and place.