ZVEX EFFECTS Ringtone TT (Tap Tempo)The Ringtone TT by Z. Vex Effects is the world's first dedicated tap tempo sequenced ring modulator for guitar use. Controls: The controls are as follows: from the upper left, there is a sequence random step switch which sets the function of the left stomp switch, a speed control for the sequence random mode, 8 individual carrier pitch adjustment knobs, the left stomp switch which enters tap tempos or operates as a manual step control, and the true