Phaser
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Electro-Harmonix Stereo Polyphase
The Stereo Polyphase analog optical envelope and LFO phase shifter gives you cascading stereo phase shifts that are out of this world. This Electro-Harmonix XO unit uses optocouplers for a smooth, liquid tone and features selectable LFO and envelope follower modes. Tone sculpting is made easy by user-defined start and stop ranges as well as a feedback resonance control switch, plus the Stereo Polyphase’s optical circuitry makes it very responsive to most hot instruments, including keyboards.