This small, white tablehooter is nothing really spectacular, but unusual is that it uses extremely pure and basic plain squarewave tones, those in their simplicity don't exist on many other keyboards (not even on 1980th ones).

The manufacturer Medeli I found out by Asian Sources; on the instrument stands only "MC-11 ELECTRONIC KEYBOARD". It has a white case with a green speaker grill centered above the keyboard. Although it is basically a stupid little thing, I like this one and chink around on it quite often.

main features:

• 32 mini keys
• monophonic
• 4 OBS preset sounds {piano, oboe, guitar, violin}:

oboe	=pure plain squarewave tone
violin	=pure squarewave tone with unequal pulse pause ratio (timbre is rather bagpipes- like)
piano	=like oboe + envelope (ignores key press duration)
guitar	=like violin + envelope (ignores key press duration)

• keys have extraordinary precise note timing response
• no rhythm
• sound generator produces only pure plain squarewave tones of 2 pulse pause ratios and with or without a fixed, capacitor- based falling- volume envelope that is truncated with a click after about 0.5s. The tones without envelope have a sharp on/ off click.
• CPU "MC1100, KS57C0002-56, 441" (30 pins) is a real SMD IC (no COB black blob) and is crystal clocked (i. e. no howling), which is unusual for such a simple instrument.
• simple sequencer (record & playback)
• 13 monophonic demo melodies
• no sound output nor AC- adapter jack
• batteries (4x mignon) last quite long

eastereggs:

• button for "one key play" of demo melodies addable

notes:

The 13 monophonic demo melodies are (note all these Engrish misspellings):

• Night In Moscow Suburn
• Mary Had a Little Lamb
• Red River Valley
• Happy Birthday To You
• Twinkle Twinkle Little Star
• 500 Miles
• Ode To Joy
• Row The Boat Ashore
• Jingle Bells
• Frere Jaques Brother John
• Hickory Dickory Dock
• London Bridge Is Falling Down
• Jambmlaya

removal of these screws voids warranty...
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