Featuring keyboardist Max Crook and drummer/keyboardist Scott Ludwig, the Sounds of Tomorrow were possibly the first two-man electronic pop group. They've not really been recognized as such, however, because they did not release any recordings while active, even though Crook was heard on one of the most popular rock & roll singles of the early '60s. For Crook was the inventor of the Musitron, the modified Clavioline that took the soaring, unearthly organ-like solo on Del Shannon's "Runaway." Crook also played the Musitron on the recording of "Runaway," as he did on a few other Del Shannon records in the early '60s. Although he was (and largely remains) a fairly anonymous figure to most pop fans (and even most Del Shannon fans), Crook deserves considerable credit for coming up with an innovative electronic keyboard sound that creatively embellished Del Shannon's early work.