A lot of people listen to about 30 seconds of Trout Mask Replica and then immediately write off Van Vliet's music as unlistenable twaddle, just weird for the sake of being weird. And it certainly is weird music--but when you really start listening to the album you start to discover a twisted inner logic to every atonal guitar shreik and weird drum beat. It all comes together to create something pretty unique in the w…
I can only imagine that what I recognize as a singular theme is in reality much more broad (in so much as we can even define it), given Zappa's composition ability and musical prowess. There's so much to discover that lies under the surface of result of his creative process. I think Zappa gets a lot of credit because in general his music is more approachable (but still has plenty of weirdness across his almost 100 album discography).
Anyway, where I'm going with this is that Zappa and Captain Beefheart went in together on Zappa's "Willie the Pimp", on the "Hot Rats" album which is one of my favorite albums of all time. Interestingly enough it's the only song on the entire album that features vocals, which is noteworthy on its own. The vocals are provided by none other than Captain Beefheart himself. The vocals are kind of strange and certainly provide a unique component to the track.
https://www.youtube.com/watch?v=Xr256gta2Qw (Willie The Pimp) -- if you listen to that guitar work, there's so much to unpack just in that one track. It's self referential on many levels, and I'm sure I'm missing most of it.