Dual Ring Modulator
http://www.doepfer.de/a114.htm
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This listing is for the Doepfer A-114 module. It was purchased new in 2013. The listing includes the module, power cable, and screws. The module has been tested and confirmed to be working as expected. Please see the photos for more details regarding the physical condition.______________________________________________________________________Manufacturer's description:Module A-114 contains two separate ring modulators. A ring modulator outputs the product (Multiplication X • Y) of the signals at inputs X and Y. It's similar to a VCA, but whereas a VCA only responds to positive voltages at the inputs (2-quadrant multiplication), the ring modulator responds to both positive and negative voltages (4-quadrant multiplication).The ring modulator thus provides a refinement of amplitude modulation (AM). Ordinary amplitude modulation will output the original carrier frequency fC as well as the two side bands (fC - fM, fC + fM) for each of the spectral components of the carrier and modulation signals - but ring modulation cancels out the carrier frequencies, and just lets the side-bands pass to the output.A ring modulator is used for the production of bell-like sounds, alien voices, or just to produce new timbres.
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