Electro-Harmonix introduce a single sideband modulator pedal 25/01/10
Here's what E-H have to say...
The Ring Thing presents state of the art modulation control allowing the user to explore a new sonic world that is both familiar and inventive. Complex modulations with interactive parameters create any sound your mind can imagine. From metallic sweeps to subtle color changes to unique and limitless modulations,the Ring Thing will become your sonic dream machine.
Articulate pitch shifting, preset tuning, selectable waveforms and external control delivers sound designer mystery, with a Rock and Roll edge. Quick Specs
Multi-wave selection for modulation and Ring Mod
Low pass Filter for Ring Mod and single side band modes
Fine and depth control for frequency select and amount
Tune switch to adjust frequency to your pitch
Upper and lower sideband isolation
High quality whammy style effects with expression pedal