The Whammy pedal has two sides; a harmonizer and a pitch bender. Trey most frequently uses the pitch bender, which allows the user to bend pitches using the expression pedal to various degrees up or down. Trey almost always uses this feature in its middle position, which is 2 half steps down. So by depressing the expression pedal, the guitar tone sweeps down two half steps, eg, from an Bb to an Ab. Then as your sweep the pedal back up, the tone returns to the original note. In early 3.0, with experimenting with this sound, dubbed the “Whale,” quite a bit. This would bringyour guitar sound higher levels. they priced at $500.00 to $800.00 on ebay. there no issues!! text me only at 530-2 zero zero zero 72 four