Behringer Cat Duophonic Analog Synthesizer


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Behringer Tabletop and Eurorack Duophonic Analog Synthesizer Based on Octave Plateau Cat

The Cat is a great all-rounder, but its secret sauce is two-note simultaneous sample and hold setups, with the sample and hold waveform either sampling VCO1's output or using the onboard noise generator for true randomness. Not all Behringer desktop synths get Cat's generous CV patch panel, either – eurorack enthusiasts take note!


Team Member since 2012

In 1975, a new synth strutted into town. The Cat, as it was called, was an analog duophonic three-octave synthesizer that was very similar to ARP Odyssey, with a keyboard that would produce two control voltages routed into its two VCOs. An ultra-affordable and even more feature-packed homage to that iconic synthesizer comes in the form of Behringer Cat. Its pure analog signal path is based on authentic VCO, VCF and VCA designs in conjunction with four variable and simultaneous oscillator shapes and duophonic/paraphonic capabilities.

  • Analog synthesizer with dual-VCO design
  • Authentic reproduction of original Cat SRM II circuitry with matched transistors and JFETs
  • Pure analog signal path based on authentic VCO, VCF and VCA designs
  • 4 variable and simultaneous oscillator shapes: sawtooth, triangle, modulated pulse and sub-octave square
  • Duophonic/paraphonic mode allows both oscillators to be independently controlled
  • Oscillators can be modulated from 6 different sources with 2 modulation depth attenuators
  • Classic filter design (low pass with peak/resonance) with self-resonance capability
  • Filter can be modulated from 6 different sources with 2 modulation depth attenuators
  • Dedicated and fully analog sine/square wave LFO
  • 2 analog envelope generators for modulation of VCF and VCA
  • White noise generator expands waveform generation
  • Poly chain allows combining multiple synthesizers for up to 16-voice polyphony
  • 47 controls give you direct and realtime access to all important parameters
  • External audio input for processing external sound sources
  • External control inputs and outputs: high note CV, low note CV, gate, filter, etc.
  • Comprehensive USB/MIDI implementation with MIDI channel and voice priority selection
  • 3-year manufacturer warranty
3/4 view of Octave Plateau Cat synthesizer showing top, left side and front

True to the original
Great care has been taken in engineering Behringer Cat, including the true-to-the-original analog circuitry, legendary VCO, VCF and VCA designs that come together to recreate classic tones that are evocative of classic electronic music.

detail image of Behringer Cat panel showing USB and MIDI connections

Keyboard control
Cat has the ability to accept any keyboard controller performance data via MIDI over 5-pin DIN or USB. The signals generated can be tweaked via the PITCH BEND slider, which can bend a note up or down one octave. Bump this up to two octaves by flipping the OCTAVE SHIFT switch up or down. Use the GLIDE slider to change how fast a note transitions to another; up is faster, down is slower. Combine that with the LFO FREQ slider to control the LFO and ADSR repeat tempo and you can create some amazing pulsating portamentos.

detail image of Behringer Cat panel showing USB and MIDI connections
detail image of Behringer Cat panel showing VCO1 and VCO2 controls

Two VCOs are better
The heart of Cat's sound is its two VCOs. The duophonic/paraphonic nature of Cat allows both oscillators to be controlled independently. Use the FINE and COARSE frequency controls to tune VCO1 to VCO2. Keyboard control on Cat can be set to either MONO or POLY. Polyphonic mode lets VCO1 generate the highest note played on the keyboard while VCO2 handles the lowest, allowing two notes to be played simultaneously. Setting the switch to monophonic mode makes VCO1 generate the lowest note sent by the keyboard.

detail image of Behringer Cat panel showing modulation controls

Make waves
Waveform switches on both VCOs allow different waveforms to be patched in from the LFO. Choose among sine, square, sample & hold and even pitch modulation through each VCO. Turning the MODULATION DEPTH knobs in either direction controls the intensity of the effect. VCO2 also comes with a SYNC switch that locks VCO1 to it and has them act as one huge oscillator to produce more complex waveforms.

detail image of Behringer Cat panel showing modulation controls
detail image of Behringer Cat panel showing VCO waveform slider controls

Slide in
Each VCO on Cat comes equipped with its own waveform sliders, where you can adjust the volume of each type of VCO waveform. Pump up the sub octave, sawtooth, square, triangle or pulse waves or mix them all together.

detail image of Behringer Cat panel showing filter controls

As if combining two VCOs wasn't enough, Cat comes with another set of claws in the form of a VCF filter section, where you can get more complex and robust tones by incorporating VCO1 into the mix. Introduce more waveforms and manipulate the Q slider to emphasize harmonics and filter cutoff slider, which acts as a low pass filter.

detail image of Behringer Cat panel showing filter controls
detail image of Behringer Cat panel showing envelope slider controls

The envelope, please...
To give the signal even more character, you can use Cat's transient generator to create a detailed voltage transient every time a key is depressed. Adjust the attack, decay, sustain and release via sliders and to shape your signal. The AR transient generator works similarly to the ADSR but with less detailed control over the envelope. You can also set the ADSR to automatically repeat or only when a key is held down. The SAMPLE + HOLD switch can be set so the VCO1 setting is sampled or, when set to noise mode, produce a random output pattern. Slide the LFO DELAY control up or down to determine when the LFO will reach its maximum output after a key is depressed.

detail image of Behringer Cat panel showing CV and audio inputs and outputs

The ins and outs
Cat features a whole slew of inputs and outputs that expand its capabilities. You can route external control voltages to VCO1, VCO2 or the VCF and even pump in some external line-level audio. You can even connect Cat to other external synthesizers through the GATE, ADSR, AR or keyboard CV outputs. Cat's poly chain function lets you combine multiple synthesizers for up to 16-voice polyphony.

detail image of Behringer Cat panel showing CV and audio inputs and outputs
More Information
Manufacturer Behringer
Condition New
Included from Manufacturer Power supply
Eurorack power cable
Analog/Digital Analog
Number of Keys None
Voices of Polyphony Duophonic/paraphonic
Oscillators per Voice 2
MIDI In, Thru, USB
USB Port (to Host) MIDI, System Updates, Editor/Librarian/Patch Manager
Audio Inputs 1/8" mono external audio input
Audio Outputs 1/8" main audio output on top panel
1/4" low and high main audio outputs on rear panel
Control Connections 1/8" VCO1 frequency CV input
1/8" VCO2 frequency CV input
1/8" VCF cutoff frequency CV input
1/8" VCF Q CV input
1/8" VCA level CV input
1/8" gate input
Width 14.7"
Depth 5.4"
Height 3.4"
Product Weight 3.5 lb
Unique Features May be removed from case and mounted in eurorack enclosure
Poly chain ready for up to 16-voice polyphony

MUSIC, Inc. Limited Warranty Policy

Behringer parent company MUSIC is committed to providing the highest quality products, service and user experience for our customers. One element of this commitment is our after-sales support, which incorporates MUSIC’s extended Limited Warranty Policy. This Limited Warranty applies only if you purchased the product from a MUSIC Authorized Reseller and is valid only in the original country of purchase. You can qualify for an extended Limited Warranty for products sold in countries served by MUSIC Authorized Service Centers, including the United States.

MUSIC warrants the mechanical and electronic components of this product to be free of defects in material and workmanship if used under normal operating conditions for a period of one (1) year from the original date of retail purchase. Subject to the online registration of your product within ninety (90) calendar days of retail purchase, the Limited Warranty shall be extended to 3 years.

If the product displays any defect within the specified warranty period and such defect is not specifically excluded in the full MUSIC warranty document, MUSIC will either repair or replace the product using new or reconditioned products or parts, at its sole discretion. In the event that MUSIC decides to replace the entire product, this Limited Warranty shall apply to the replacement product for the remaining warranty period of the product replaced.

Warranty service conditions are subject to change without notice. Please regularly refer to the latest warranty terms and conditions, and additional information regarding MUSIC's Limited Warranty at their website.

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