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Evolution

New Evolution


Rossum Electro-Music Evolution - Variable Character Ladder Filter


At the core of the Evolution Variable Character Ladder Filter is Dave Rossum's enhancement of the iconic Moog ladder filter from the original E-mu Systems 2100 LPF module (which, incidentally, Dave counts as his favourite sounding of all of the analog filters he designed.)


For Evolution, Dave has designed new capabilities that not only allow you to dial in all of the outstanding qualities of the original 2100, but combine 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 cut off 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 extremely accurate and temperature-stable frequency control exponential generator (accurate over 10 octaves), rivalling the specifications of the best analog VCOs.


Taken together, Evolution gives you everything from the platonic ideal of the classic ladder filter to a vast selection of alternative filter characteristics.


And like all Rossum Electro-Music modules, it's solidly built, with machined aluminium knobs and high quality components throughout.


Controls

Initial Frequency

Initial Q

Q Level Compensation

Initial Genus (Number of Poles)

Initial Species (Ladder Input Level)


Signal Input

1x 3.5mm mono socket - 100 kΩ  Input Impedance


Signal Output

1x 3.5mm mono socket - 1 kΩ  Input Impedance


Frequency CV Inputs

1x Attenuated - min 50 kΩ  Input Impedance

1x w/Attenuverter - 100 kΩ  Input Impedance

1x 1V/Oct Full Level - 100 kΩ  Input Impedance


Q CV Inputs

1x Full Level - 100 kΩ  Input Impedance

1x w/Attenuverter - 100 kΩ  Input Impedance


Genus CV Inputs

1x Full Level - 100 kΩ  Input Impedance

1x w/Attenuverter - 100 kΩ  Input Impedance


Species CV Inputs

1x Full Level - 100 kΩ  Input Impedance

1x w/Attenuverter - 100 kΩ  Input Impedance


Specifications


Width:16hp
Max Depth:25mm
Power:+12V: 85mA

-12V: 75mA


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  • £300.00
  • Exc VAT: £250.00

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