
GFI System
Duophony
Pitch Shifter
Dual-voice harmony/pitch pedal. Generate harmony lines and pitch effects in real time.
Duophony generates dual harmony voices and pitch effects in real time. Create harmony lines, octaves, and pitch-shifted textures that follow your playing dynamically.
Controls set harmony intervals, blend between voices, and adjust tracking response. Works with single notes and responds to playing dynamics.
Stereo output separates voices for spatial spread. Compact enclosure with top-mounted jacks.
9VDC center-negative. Made in Indonesia.


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