Yeno - Der kleine Musikant

Yeno - Der kleine Musikant (squarewave toy keyboard with analogue rhythms)

This toy keyboard (German name means "The little musician") has unique analogue rhythms and nicely gritty squarewave sounds.

main features:

yellow console shaped case with red LED note display above the keys
monophonic main voice
23 mini piano keys + foil keypad control panel
volume control pots for keyboard and microphone (2 big red knobs)
5 OBS preset sounds {trumpet, flute, violin, organ, piano}
12 preset rhythms {rhumba, disco, rock'n'roll, bossanova, swing, tango, jazz waltz, slow rock, 16 beat, waltz, march, beguine}
tempo +/- buttons (They can only double or half the actual rhythm speed at each press, which is a very stupid concept for making normal music, but it is interesting for tekkno.)
4 tiny foil drum pads
4 percussion sounds {base, snare, hihat, conga}
main voice is squarewave with very gritty digital zipper noise envelopes (3 bit?). The piano sound ignores key press duration.
analogue transistorized drum sound circuit with white noise transistor, a simple click as base drum and a great conga. (Sounds resemble 1970th home organs.)
5 audio games and several built-in melodies
simple sequencer (record/ playback, no edit)
10(?) demo melodies
power supply jack

eastereggs:

The conga pitch fades from very low to its normal frequency within some seconds when power is turned on due to charging capacitors.

notes:

By the analogue drum section this instrument provides a very high potential for circuit- bending. By replacing the clock crystal with something adjustable the problem with the strange rhythm tempo button behaviour could certainly be solved. Also the gritty squarewave sounds are quite interesting.

*removal of these screws voids warranty...*

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