the valerie project[0] was a psychedelic folk band that toured the US playing screenings of "valerie and her week of wonders," a 1970 czech surrealist horror movie (highly recommended!). they were pretty awesome, especially for a one-off super obscure thing like that.
related but different: guitarist loren connors did a soundtrack for "the passion of joan of arc" (1928)[1] that I find incredibly moving. for those not familiar with connors' work, it comes from a kind of catholic guilt that makes his score and this particular film an artfully brutal pairing.
0. http://www.dragcity.com/products/the-valerie-project
1. https://vimeo.com/53953169 (excerpt)