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Electro-Harmonix Stereo Polyphase Analog Optical Envelope / LFO Phase Shifter (Demo by Dan Miller) - YouTube
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Amazon.com: HQRP 24V AC Adapter Compatible with Electro-Harmonix Q-tron Plus Q-tron+, Classic Microsynth, Stereo Polychorus, Stereo Polyphase, The Worm Power Supply Cord Adaptor EHX, UL Listed : Electronics
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