Piers Haggard's 1971 horror film Blood on Satan's Claw has found a cult following over the years, drawing fans of the classic movies by Hammer Studios, though this movie was actually released by a rival company, Tigon British Film Productions. The spine-tingling soundtrack by Marc Wilkinson has received its own share of accolades and attracted serious attention, largely for the prominent use of the Ondes Martenot, an electronic instrument similar to the theremin, and the cimbalom, a stringed instrument played with hammers or a plectrum. These haunting sonorities, with several others, are used to maximum advantage in what is otherwise a rather spare and eerily quiet score. Also effective is Wilkinson's obsessive use of a short chromatic motive based on the tritone, or the "Diabolus in Musica," to symbolize the film's resuscitated demon and his evil acolytes; this repeated, chattering figure creates an insistent and mocking tone throughout the soundtrack. On listening to this album without seeing the film, one might think Wilkinson overplays the tritone theme, to the point of making it seem a bit ridiculous; yet in the context of the film, this is a simple but highly effective hook that helps hold the otherwise atmospheric and delicate soundtrack together. The small studio ensemble is not credited, but its performance throughout is professional and polished, and Trunk's remastering of the analog tapes is clear, though a little dry and airless.