look at 6:06, he pressed something and his guitar went ham, and yet still under control. What pedal was he using there?
Could be a phaser or flanger with some of its parameters maxed out.
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i'm thinking it's a delay that has been turned up to self ocsillating 
It's a phaser post drive.

A flanger would have a different kind of filter sound and a delay would have changed pitch and kept oscillating until he turned the knobs to reel it back in.

EDIT: Don't forget there seems to be a Leslie going on too.
Originally Posted by evening_crow
Quoting yourself is cool.

WARNING: I kill threads.
Last edited by evening_crow at Mar 18, 2017,