- controls the speed/rate of the LFO wave that controls the effect
- controls the depth/amplitude of the modulation (the size of the range in which the effect sweeps).
- sets the amount of effected signal fed back into the effect (for a stronger effect)
Stereo Phaser gives up to 180 degrees of phase shift from a six-stage regeneration phase circuit. The FX20-B offers that unique sweeping only a phaser can give.
a 1990 DOD brochure
The FX20B Stereo Phaser gives up to 1080 degrees of phase shift from a six stage regeneration phase circuit. The FX20B offers that unique sweeping and tremolo only a phaser can give.