[On the wah-wah pedal invention] Dick Denney at Vox U.K. invented the original prototype, the midrange boost switch. When it was converted to
transistors, they put a variable switch on it. I thought, 'Let's put it on a pedal.' We got one from a Vox organ, and it
fit very nicely. After I demonstrated it to all these engineers and music producers, everyone said, 'This will be the
greatest thing - the trumpet players are going to love it!'