Disc 40: It's more the result of my mind-space than anything actually present in the sounds (probably), but I am still not getting into the 90s era of Merzbow loops/collage stuff. In the 80s, there was an indistinct mystery permeating through them, giving each fragment of sound a sense of meaning. Here is feels much more "up front" and far less murky---it's a drum loop, that's all. However, the actual noise tracks were good.
Despite all that, this actually makes me want to give Music for Bondage Performance another listen (it's been a few years). I remember that "soundtrack" being much less overtly musical than this, but my memory of it could also just be failing.
Now that I think of it, "soundtrack Merzbow" is another aspect of his work that seems very underdiscussed. It would be interesting to work through all of them in order to see how that evolution does or does not differ from his mainline output.