Sound
Del Casher (born Delton Kacher, 1937, Hammond, Indiana) is an American guitarist and inventor. He invented the wah-wah pedal, the Ecco-Fonic, and the Fender Electronic Echo Chamber. He was the first to introduce the Roland Guitar Synthesizer for the Roland Corporation.

Classic Albums: Frank Zappa & The Mothers Of Invention - Freak Out!
Self

The Ventures: Stars on Guitars

Eat That Question: Frank Zappa in His Own Words
Self (archive footage)

Cry Baby: The Pedal that Rocks the World

Scandal: Sex@students.edu

Classic Albums
Self

White Cargo

Plan 10 from Outer Space

Tropical Heat

Lethal Games

Crash and Burn

Dadah Connection

Murder Weapon

Action U.S.A.

Deadly Embrace

The Laughing Dead

Lady Avenger

Nightmare Sisters

24 Hours to Midnight

Our Town

Roustabout
Guitarist (uncredited)