Amount varies the depth of phaser modulation, from barely perceptible at the full counterclockwise position, to the full sweep range of the phaser (full clockwise or “Kill” setting).
Rate determines how fast the LFO oscillates. The LFO light blinks to give a visual indication of the LFO rate.
The Lo/Hi switch selects the range of the Rate control. When the switch is Lo, the Rate control varies from 0.01 Hz (one cycle every hundred seconds) to 2.5 Hz (2.5 cycles every second). When the switch is Hi, the Rate control varies from 2.5 Hz (2.5 cycles every second) to 250 Hz (two hundred fifty cycles per second). With such a wide range of rates available, obviously you’ll need to adjust Rate after you flick the Lo/Hi switch to get the sound you desire.
Control the Phaser with the Sweep and Resonance knobs and the 6-Stage/12-Stage switch.
Resonance adjusts the feedback of the analog filters. As you add more resonance, the peaks caused by the filters get sharper and more noticeable.
Sweep adjusts the center frequency point of the filters. Use it in conjunction with Amount to control the frequencies affected by the phaser.
Bypass glows either red (bypassed) or green (not bypassed) to show whether or not the effect is in the signal path.