Cry Baby:The Pedal that Rocks the World
"Cry Baby:The Pedal that Rocks the World" is a 2011 documentary film by Max Baloian and Joey Trosi about the history of the musical instrument, the "wah-wah pedal".
Frank Zappa is named as one of the first musicians to use the "wah-wah pedal". Dweezil Zappa and Del Casher are interviewed about Zappa and Willie The Pimp is used on the soundtrack. Dweezil also mentions that Zappa and Jimi Hendrix were good friends and the rumor that Zappa introduced the "wah-wah pedal" to Hendrix might be true.