The Avant Garde/Experimental Music Recommendation Thread
 

Any Noise or Math Rock similar to

Shellac
Sleeping People
Unwound
Polvo
Drive Like Jehu
Piglet
Chavez
Hella
Don Cab

possibility?

You should check out U.S. Maple

azwarm
aboombong
dustdevil & crow
bendle

check out ahleuchatistas; they're most similar to hella out of that list.

I'm looking for some experimental rap/hip hop. Any ideas?

Well, from what I've listened to:

Rat At Rat R - Rock & Roll Is Dead, Long Live Rat At Rat R (1985)
Live Skull: Bringing Home The Bait (1985), Cloud One (1986), Dusted (1987)
Ut - In Gut's House (1988)
Rapeman - Two Nuns And a Pack Mule (1988)
Bastro: Rode Hard And Put Up Wet (1988), Diablo Guapo (1989), Sing The Troubled Beast (1990)
Scratch Acid - The Greatest Gift (compilation 1991)
Jesus Lizard - Head\Pure (1990\89)
U.S. Maple - Long Hair in Three Stages (1995)
Killdozer
Helmet

You're probably familiar with Big Black and Butthole Surfers

Relatively newer groups: Lightning Bolt, Magic Markers

^ Yeah I already know a few artists on that list but I'll be sure to check everything out, thanks guys.

Merzbow... if you dare.

Already covered most of these in the Best Math Rock thread but...

Rumah Sakit
Tera Melos
Three Trapped Tigers
Rodan
June of 44
Hot Snakes
LITE
Lynx
Tic Code
Faraquet
Medicine