The BOSS PH-3 is a 7-mode phaser with tap tempo and simple controls offering classic-sounding 4, 8, 10 and 12-stage effects but also "Fall" and "Rise" modes (creating unidirectional phasing) and "Step" mode, which randomizes the LFO in steps synched to the tempo. The rate can be controlled through an Expression pedal.... Click on the title for more