490 pages, hardback, with 60 black and white photographs. Foreword by Francis Ford Coppola. Published by Oxford University Press. Voltage control. Two words, and everything downstream of them: the oscillator that tracks a keyboard, the envelope that shapes a note's attack and decay, the ladder filter that gives a sawtooth its wet, vocal edge. These are the grammar of the instrument, and they are almost all his. Anyone who has turned a cutoff knob has touched Bob Moog's thinking. He died in 2005 …