www.tunnelvisionmusic.com - The Ringtone by Z.Vex Effects is the worlds first dedicated sequenced ring modulator for guitar use. Controls: The controls are as follows: from the upper left, there is a run/step switch to select sequence/random operation or manual stepping operation, a speed control for the sequence/random mode, 8 individual carrier pitch adjustment knobs, the sequence/random stomp switch which doubles as a manual step control, and the true-bypass stomp switch on the right ...