Conversation so far:
What was special about Tom Morello's technique?
Morello chooses various effects pedals.
During his tenure in RATM, he used a Dunlop Cry Baby, a DigiTech WH-1 Whammy, a Boss DD-2 Digital Delay, a DOD EQ pedal .
How did he learn this method?
CANNOTANSWER.

Question: Did he always use this technique?
Self-contained rewrite: Did Tom Morello always use the pedal technique?