This is in your review of The Black Rider. Somehow nobody has pointed this out in over five years:

"The background of this album, in brief, is that this is the soundtrack to a musical collaboration with Robert Wilson and William S. Burroughs, who worked with Frank to make an adaptation of an old German folktale which had once been made into a famous German opera."

I'm pretty sure you meant to say Tom there, not Frank. I guess he got into character on Frank's Wild Years a little too well.