Rossum Electro-Music Evolution Filter Video Demo

Rossum Electro-Music‘s Marco Alpert shared this video demo of their Evolution Variable Character Ladder Filter for Eurorack modular synthesizers. 

The module was introduced at the 2016 NAMM Show, where we talked with creator Dave Rossum about it and their other new Euro modules:

The video demos some of the sonic possibilities of the Rossum Electro-Music Evolution Variable Character Ladder Filter. We thought it might interest your readership.

The Evolution filter is designed to not only deliver the qualities of the original 2100, but also to let you create the sonic characteristics of a wide variety of other filter types.

They include:

  • A Genus control that allows continuous voltage control of the number of filter poles (from 3 to 6 poles), essentially allowing real-time variation of Evolution’s effective cutoff slope from 18dB/oct to 36dB/oct. LEDs give continuous indication of the current slope.
  • A Species control that lets you vary the signal level into the ladder, letting you control the intensity of the filter’s characteristic distortion. When in self-oscillation mode, this control modulates the amplitude of Evolution’s output.
  • Voltage controlled resonance with a variable Q Level Compensation control that controls the balance of the resonant peak and the frequencies below the cutoff frequency (which would otherwise be attenuated as the resonance is increased).
  • An frequency control exponential generator (accurate over 10 octaves), that they say rivals the specifications of the best analog VCOs.

Details on the Evolution filter are available at the Rossum Electro-Music site.

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