via this auction
You can find a demo of one here.
"This is a Dubreq Pianomate analog synthesizer piano enhancer.
Dubreq's Pianomate is a crazy box of tricks, designed to capture the tone of a piano creating an electronic & acoustic sound together like a hybrid synth.
Two bars with sensors rest on the keyboard wired into the amp/speaker built into the Pianomate.
The bars, treble/bass respond to piano playing, when the key is pressed the tonebar key drops down, creating the note.
This results in a synth sound, that's warm but polyphonic.
A 3-way rocker switch controls 'Balance' (bass, both, treble), another 3-way rocker selects 'Voice' (french accordion, organ, flute, jazz buzz).
There are two volume knobs Pianomate & Mic. Another 3-way switch control vibrato.
Between the two volume knobs is access to a small trim pot that allows fine tuning of vibrato speed.
This Pianomate is in great condition."
