The BOSS PH-3 Phase Shifter pedal brings in host of classic and modern phasing effects, including RISE and FALL modes for continuous falling and rising effects. Synchronizing these phasing effects is made very easy; just tap the pedal to the desired tempo. The BOSS PH-3 gives you 4, 8, 10 and 12-stage Phase Shifters, plus a Step effect. The BOSS PH-3 guitar effect pedal also supports an optional expression pedal for real-time control of the Rate, Filter and Tempo. This guitar effect pedal also features a step filter to run the guitar sound through random phage stages at a steady pace, creating wonderful phasing effects.