Vintage Playskool Kid Keys PS-635 Keyboard Synth Toy Circuit Bending Project Tested Works 1993 Audio

Vintage Playskool Kid Keys Synthesizer PS-635 in excellent condition!

Very rare synth toy with audio output jack for recording or live performance capabilities.

Features:
29 mini keys
monophonic main voice
4 OBS preset sounds {violin, flute, piano, organ} (selected by a slide switch)
3 OBS preset rhythms with unique percussion
volume knob
tempo +/- buttons (16 steps)
sound generation is based on multipulse squarewave and resembles much the Hing Hon EK-001. Exceptional is the "organ" sound, which is an incredible sinister and massive sounding, powerful church organ variant with much reverberation. The piano sound ignores key press duration.
percussion sounds {base, snare, hihat, cowbell} sound very electronic and extremely impulsive and are best comparable with Atari POKEY chip sounds. They all use digital envelopes and either squarewave or shift register noise. The cowbell (squarewave with digital envelope and zipper noise) sounds like a bottle hit. The snare uses a very rough and impulsive hissing shift- register noise (like a historical videogame's MG shot), the hihat uses a quieter hiss. The base is just a quick fading squarewave. These percussion in spite of their basslessness sound incredible vigorous and are an as outstanding sound discovery as the nowadays so well known and everywhere imitated TR-909 base drum.
primitive sequencer (record/ playback, no edit, stores 62 notes)
12 demo melodies (monophonic monotos with each a different rhythm)
headphone jack

Excellent shape considering its age and everything work as it should.

Battery cover intact and clean battery compartment.

Great item for possible circuit bending / mods.

Comes from pet free and smoke free home.