Joshua, the Black Rider is a 1976 Western film starring Fred Williamson as a black Union veteran who becomes a bounty hunter in order to revenge himself on the white men who killed his mother. It has a different take on the revenge western, but it's standard fare at root. The music is a piece of repetitive trash, and I found it irritating to the point of distraction. I managed to make it through the film -it's not bad at all except for the sound track- but that may be the worst film sound track I've ever sat through.
It's fairly thoroughly ignored. Rotten Tomatoes doesn't have either a critics or an audience score for this movie.