www.tunnelvisionmusic.com - A New Approach to Tremolo........... Yes indeed, the Red Witch Pentavocal tremolo offers several features that are completely unique and unavailable elsewhere. Since the fifties the concept of tremolo has changed very little. Controls for Speed, Depth, Volume and Waveshape have been the parameters available for adjustment. Till now. The Pentavocal tremolo is simply that - a tremolo with five different voices to choose from. You can select the frequency response by ...