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Rossum Electro-Music Linnaeus Thru Zero State Variable Filter Module

SOLD OUT Rossum Electro-Music Linnaeus Thru Zero State Variable Filter Module

Rossum Electro-Music Linnaeus - Thru-Zero State Variable Filter


Following in the tradition of Evolution and Morpheus, Linnaeus represents yet another Dave Rossum innovation in filter technology.


Linnaeus is a stereo state variable filter that provides the unique ability to linearly modulate it's resonant frequency through zero into negative frequency, while maintaining stability. With extensive voltage control of nearly every parameter, Linnaeus lets you manipulate the filters natural response curve in new ways, to create both subtle and dramatic timbral effects. And with a 'one-knob-per-paramter' interface, Linnaeus inspires sonic creativity that invites (and rewards) in real-time interaction.


Linnaeus's cutoff / resonant frequency is exponentially voltage controllable from sub-audio to ultrasonic frequencies, while it's resonant gain (Q) is exponentially voltage controllable from 0dB to greater than 60dB.


Linnaeus's channel output response characteristics are independently and continuously variable from Lowpass, through Bandpass, Highpass and Notch, to Low and High Shelving characteristics. Voltage control of the response characteristics are independently selectable for each of the two channels. 


The linear thru-ero modulation is provided by an integrated modulation oscillator and / or External Linear FM modulation input.


The voltage-controllable modulation oscillator can track the filter's exponential frequency or operate independently. The modulation oscillator's output waveform is continuously variable from Off through Sine, Triangle and Sawtooth to Square. The modulation oscillator output is summed with the external linear FM inputs and applied to the modulation index VCA, which controls the linear thru-zero modulation index from zero to 8X. The modulation index is, of course, also voltage controllable.


Features


•           Ultra-wide frequency range, exponentially voltage-controllable from sub-audio to ultrasonic via precise 1V/Oct and attenuverted CV inputs

•           Thru-zero linear frequency modulation via an internal modulation oscillator and / or external linear FM input

•           Variable linear modulation index, voltage-controllable via and attenuverted CV input

•           Resonance (Q) exponentially voltage-controllable from 0dB to greater than 60dB via 6dB / V and attenverted CV inputs

•           Continuously variable response characteristics independently selectable for each of the two channels via individual Response Enable controls. Characteristics include Lowpass (12dB / Oct and 6dB / Oct), Notch and Low and High Shelving

•           Voltage control of response characteristics via an attenuverted CV input. Individual Response CV Enable controls let you independently enable or disable CV control of response for each channel

•           An integrated modulation oscillator with continuously variable waveform from Off through Sine, Triangle, Sawtooth and Square. It's frequency can be exponentially voltage controlled via an attenuverted CV inout

•           A Track control that lets the modulation oscillator precisely track the filter's exponential frequency

•           Stereo inputs and outputs. Linnaeus can process a stereo signal or two independent mono signals. While the two channels share the filter's cutoff / resonant  frequency, the filter response characteristics can be independently controlled for each channel

•           The solid, high-quality construction you expect from Rossum Electro-Music


The functional description above describes Linnaeus as originally conceived and designed by Dave. However, late in the beta testing process Chris Meyer raised the possibility of alternative behaviour that let Linnaeus function as a self-contained (i.e. no input required) stereo oscillator and / or FM percussion voice with some really powerful timbral capabilities.


While they were initially hesitant to try and shoehorn the new functions into the existing interface, once Dave had prototyped them, it was clear to them all that they were just too cool not to include. So they're provided the in the form of alternate firmware accessed by pressing and holding the Egg button.


Specifications


Width:16hp
Max Depth:25mm
Power:+12V: 155mA

-12V: 36mA


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  • £374.00
  • Exc VAT: £311.67