Octave The Cat 37-Key Duophonic Analog Synthesizer with Manual SN A1553

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Pics of the inside below.

"Released during the era of the Minimoog and ARP Odyssey, Octave's The Cat is a classic analog synthesizer whose design closely resembles the ARP Odyssey, leading to legal action from ARP in the late 1970s. This monophonic/duophonic synthesizer features two oscillators capable of square and sawtooth waveforms, with VCO 1 also offering a triangle waveform. Each waveform can be played simultaneously and mixed, with additional sub-octave oscillators on each VCO for creating rich and interesting sounds.

The keyboard can switch between 2-voice (poly) and 1-voice (mono) modes. In mono mode, the two oscillators can be stacked for a rich mono-bass or mono-lead synth sound. Poly mode splits the oscillators into separate voices, allowing for slightly more complex melodies with overlapping notes or basic pads. The sub-oscillator plays an octave below the actual note, adding warmth and depth to your sounds.

The Cat has been used by artists such as The Dust Brothers, Chemical Brothers, Devo, Rod Argent, David Bedford, Lyn Berger, Dave Greenslade, OMD, Loaded, and Mixmaster Morris. This particular unit features an additional, unlabeled knob next to the pitch slider, which controls the modulation intensity on the VCO. When turned to its maximum value, it creates a "pulse-like" effect, producing an extreme pump sound wave. This unique modification enhances the synth's versatility and character.

The synthesizer is in very good condition, fully functional, and includes the bottom panel, which was removed only for photographing the circuitry and showcasing the clean internal workings. The only real sign of wear is the power cable is missing the grounding prong. Complete with the original manual, this vintage Cat synthesizer is a rare find for any enthusiast or collector."