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Octave The Cat

Pictures from a complete restoration of an Octave The Cat Rev.1. This one does not use the SSM chips that later models of this synth used. The restoration included recapping, cleaning of sliders and rotary pots. Cosmetic facelift of the entire synth including reworking of the wooden panels exchanging the white PVC edge plastic. New knobs and the addition of a midikit.

I don't know why there was a drilled hole beneath the inputs and outputs. But I used this to install the Synhouse midi kit.

Cleaned with new bushings installed.

Here is a little special installation of mine. The Cat Synthesizer actually has one voltage provided by the bus bar and one by the J-wires for the trig and gate signals. So to solve this problem I installed an analogue switch IC, what it does is that it takes the gate signal from the bus bar and the trig signal from the J-wires (One of the signals is inverted and the J-wires and bus bar has two different potentials, when a key is pressed the trig goes low and the gate goes high or vice versa (Too long ago I did this installation to remember which) in turn gates the gate of the ADSR and trigs the trig of the AR envelope). Anyway the analogue switch is closed and opened by the Gate Volts generated by the Synhouse midi kit, this simulates the internal keyboard action through midi.