This was possibly a direct hardware predecessor of the famous My Music Center. Despite similar functions it lacks the chorus timbre because the sound generator here lacks the 2 subvoices. But by a matrix easteregg it can be switched into a monophonic chorus mode that layers both polyphony channels to form the chorus effect. Nasty is that this thing originally includes no volume control and plays its harsh digital tones for a toy unbearable loud. Interesting is the rhythm section with programmable rhythm and the impulsive "cluck" sound. There is also an optional fixed key accompaniment.

main features:

• 32 mini keys
• no power switch but an "On/Off" standby button with auto power off which plays a short jingle at start-up and power down.
• 2 note polyphony (even with rhythm on). A keyboard bug cause random pitched notes when accidentally more than 2 keys are pressed simultaneously; this limits intuitive playability.
• 8 OBS preset sounds {piano, vibe, oboe, trumpet, saxophone, banjo, violin, guitar}
• 8 OBS preset rhythms (PCM drums with switchable fixed- key accompaniment) {march, swing, country, rock&roll, disco, rhumba, slow rock, waltz}
• 4 drum pad + selection button to switch them between drum or animal samples {Snare Drum/ Cluck, Hi hat close/ Duck, Kick/ Dog, Tom/ Pig} The "cluck" (hen) sound is very impulsive, and in combination with the drumrolls of the "march" rhythm this one sounds really great.
• monophonic sequencer for 32(?) note events exists (rather useless because it is always recording and contents is erased as soon "stop" is pressed (e. g. to stop a rhythm)).
• custom drummer to program a 16 slot rhythm pattern. It can also be combined with accompaniment by selecting a rhythm with accompaniment and than pressing "Null/ Play" to start the custom drummer rhythm. Great is that the custom drummer and even the sequencer data don't get erased by switching power off (so far the CPU stays connected with batteries or other power supplies).
• no volume control and earbleeding loud default volume. :-6
• The sound generator seems to be technically identical with My Music Center, but unlike there, here the melody voices don't consist of 2 sub-oscillators. This makes the tones sound quite thin, but permits to play two channels even with rhythm on. The instrument sounds of this instrument are very basic waveform samples with a simple envelope; they sound really harsh and rather boring. Only the banjo sounds natural. Besides the 4 drum pad percussions, the rhumba rhythm contains a 5th "bongo/ parrot"(?) sound. The CPU contains a time slice DAC, which outputs polyphony channels time multiplexed as a comb-shaped signal that is turned into analogue waveforms by a capacitor. The output frequency intermodulates higher notes and gives them an unusual glassy timbre.
• CPU= "S13909, 1ARIN(?), HT3650" (26 pin COB, identified as Holtek HT3650B) with DC voltage controllable clock oscillator
• 8 demo melodies (no great compositions, but at least rhythm varies)

eastereggs:

• chorus button to combine both voices to a richer sounding monophonic voice. (In sequencer playback mode chorus is generally always on.) The chorus can greatly simulate the timbre of a German police car siren ("Martinshorn").
• individual OBS buttons for each demo melody addable.

modifications:

• cinch sound output, speaker mute switch and AC adapter jack with regulator added.
• volume control and pitch pot added.
• chorus button added.

notes:

Since there is no real power switch, the added pitch pot must be used carefully during battery operation, because an undiscovered crash by overclocking can prevent the hardware from powering down properly, which may result in excessive battery discharge and battery leaking. Although the hardware resembles My Music Center (see there), shitshooting the program by overclocking causes no really interesting effects, but only continuous tones or no response. (Don't forget to reset afterwards, because there is no power switch.)

The 8 demo melodies of this instrument are (according to the manual):

1. Old McDonald Had a Farm
2. This Old Man
3. The More We Get Together
4. Itis a Small World
5. Twinkle, Twinkle, Little Star
6. Yankee Doodle
7. Do Your Ears Hang Low [That does the missing volume control... ;-) ]
8. Frere Jaque

removal of these screws voids warranty...
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