Roger Mayer was an acoustic engineer for the British Navy who in the late 1960s, through his pal Jimmy Page, became the go-to electronic effects whiz for Jimmy Hendrix, Jeff Beck, Bob Marley, Stevie Wonder, and a bunch of other innovative musicians. For Hendrix, he built the Octavia, a pedal that doubled the input pitch an octave higher or lower and, natch, added fuzz. I love the 1968 photo above of Mayer with the Jimi Hendrix Experience. Mayer is still in the game, making and selling guitar effects pedals via his site here. And for an interview with Mayer, check out the video below.
(Via Boing Boing.)