1987's forgotten animated musical ROCK ODYSSEY presents Scatman Crothers

Hanna-Barbera's feature film ROCK ODYSSEY is mostly remembered only by die hard animation fans, but the Robert Taylor-directed flick is a strange little monster that deserves slightly less obscurity.  Intended as a TV special in 1981, the film featuring a thin plot thread as an excuse to animate music videos of covers of classic rock hits was shelved until 1987 when ABC got cold feet due to some of its disturbing imagery.  When finally released to international audiences, some additional sequences were added featuring Hanna-Barbera characters.  It's never been released in the U.S., but it occasionally plays on TV in Latin American countries, though the Spanish dubbing lacks the dulcet tones of Scatman Crothers, who plays the film's jukebox narrator.  Good luck finding a complete English langauge copy, though as it's mostly musically-based, it doesn't make much difference.