bizarre childhood movie memories

There have been just a very few movies that I randomly watched sometime during my childhood that really stuck with me until I found them again later.   One in particular has long been haunting me and it is truly bizarre. Truly.  I have long remembered this particularly unsettling version of Jack and the Beanstalk (1976) - a sort of comical yet dark cartoon musical with profoundly disturbed and funny characters, seriously haunting music (70's rock-opera), and an anime princess.  And until now, I've never been able to put my finger on it again.  But the internet has solved the mystery for me!   You know I'm going to have to get my hands on it somehow just to make my husband watch it with me.  If you are interested in funky kid-videos - definitely check this one out!  In the meantime,  I highly recommend you read the reviews (here), you'll definitely be amused.  (note: I don't really recommend this for children, watch it yourself first)