MATRIXSYNTH: Bontempi HF232.20 rare electronic keyboard organ rhythm preset machine SN 40320139

Sunday, March 01, 2020

Bontempi HF232.20 rare electronic keyboard organ rhythm preset machine SN 40320139


via this auction

Note the headphone out jack is actually labelled "EAR."

"Main features:
44 fullsize keys

polyphony 8 notes (only 4 with accompaniment)

4 combinable OBS preset sounds {flute, strings, brass, oboe} selected by locking switches

6 OBS preset rhythms {waltz, slow rock, swing, disco, rock, latin} selected by locking switches

vibrato switch

fingered & single finger chord

chord memory switch (means simply that chord is held when releasing keys)

manual chord mode switch (labelled "automatic)

tempo slider

master & rhythm volume slider

main voice is squarewave without envelope, muffled through capacitors

analogue percussion {base, snare, hihat, clave}; cymbals and snare are made from transistor noise.

main ICs "AMI 8233MAB, 27430510" (40 pin DIL) + "AMI 8301XU, 27430520" (24 pin DIL)

mains operated

headphone & line out jack

large built-in speaker (in the case bottom, makes nice bass)"

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