John Frusciante’s DigiTech Whammy 4 Pitch Shifter
Used very briefly towards the latter part of the Stadium Arcadium tour circa 2007. Unfortunately, no one really seems to know when and where he used it, but it was most likely just something John was experimenting with. Maybe he planned to use it during one of his intro and outro solos, which could get weird (in a positive way) from time to time.
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