Before covering the subculture of cover bands in 2002’s little-seen Tributary, director Russ Forster pursued another “notable” subject in oddball music. So Wrong They’re Right examines the small, but fervent — okay, freakishly obsessed — cult surrounding the music industry’s most Jurassic of formats: the 8-track tape.

Filmed cross-country, the lo-fi movie interviews nearly two dozen 8-track enthusiasts — a few of them falling into what society would deem “normal,” but a majority of them otherwise — about their unusual hobby. Among the notable subjects are members of the ’90s grunge-rock outfit Gumball, who once bought a garage full of 30,000 tapes because they could, and a woman whose fondness for the format is surpassed only by an unhealthy fixation for toothy CHiPs star Erik Estrada.

Too long by a tad, yet always amusing, So Wrong proves not having a budget is insignificant if your camera is aimed at real people with compelling stories to tell. The highest praise I can give it is it made me want to buy one those cool, highly coveted “space helmet” 8-track players — not to play anything; just for purposes of aesthetic display. —Rod Lott