The analogue waveguide resonator.

In 1971, the congenial mathematician, quantum physicist and room acoustics expert Michael Gerzon published an article about a reverberation device. The device in question used a matrix operation to rotate two signals inside each other. He concludes in his article that it would be impossible to build the device using existing technology.

In this conversation concert, we present Gerzon's device, re-imagined as a resonator. Its complex analogue circuitry is based on two bucket-brigade delays and an analogue rotary operation. Thanks to this circuitry, our new Eurorack module produces rich harmonic and inharmonic spectra, creating physical and vivid sounds with astonishing depth and detail. For the first time, efficient physical modelling synthesis is possible in an analogue signal path, going beyond the usual harmonic string sounds and opening up fascinating new soundscapes. The Resonator offers a wealth of parameters, yet remains intuitively playable, inspiring audiences and performers alike.