kawai Teisco s100p vintage analog synth

via this auction

"Here are the specs for this synth:

A 37-key, C-C keyboard; they have 32 preset sounds that are selected using switches beneath the keyboard, and a left-hand control panelThe bass sounds possess a solid low end, the shakuhachi is smooth and effective, and the four "synthe" sounds have a pleasing rawness. The limited tweaking afforded by the panel controls includes a clumsy pitch-bend slider, filter "brilliance", and modulation rate, as well as octave up/down, portamento (and glissando) time, tune, volume and three keyboard triggering modes.

Perhaps the most unexpected and interesting aspects of this synth are its built-in reverb and assignable aftertouch. Reverb is of the spring type, with an effect level knob on the panel; aftertouch also has a sensitivity control knob to suit your playing, and can be routed simultaneously to several destinations, including pitch bend up/down, filter, vibrato amount and "growl". The degree of flexibility this adds to the otherwise simple sounds makes this synth much more expressive than many more patchable monos of the time. There is also an "effects" section allowing the switching of porta/glissando, hold/sustain, note repeat and – another nice feature – a flanger.

There is minimal interfacing here: high and low outputs, headphone jack, and an expression pedal input for volume control – but the advantage of this is that the 100P begs to be played. Forget your CV/Gate, your MIDI and USB – forget how many demisemiquavers you can quantize at 300BPM – flex your finger joints and have some fun!

NOTE: The underside of the S-100P bears a sticker labelled "Manufactured under license from ARP Instruments Inc, USP 3,965,789". This refers to the "Electronic Musical Instrument Effects Control" – the aftertouch."