Casio Casiotone MT-540

Odlicna, sa originalnim napajanjem. 80-te godine.

• 49 midsize keys (well responding)
• 2 built-in 11cm speakers (of reasonable quality, stereo)
• main voice polyphony up to 10 notes (only 4 with accompaniment, 5 with dual voice sounds, 2 with dual voice + accompaniment)
• 20 semi- OBS preset sounds {piano, harpsichord, vibraphone, jazz organ, pipe organ, brass ens, flute, bells, percussion, sound effect 1 | elec piano, funky clavi, jazz guitar, organ, accordion, strings, chorus, synth-ens, bass, sound effect 2} (selected through 10 OBS buttons + bank switch button)
• 10 additional hidden preset sounds {metallic sound, honkytonk piano, marimba, oboe, synth-reed, harp, synth-celesta, synth-clavi, fantasy, miracle} (accessible through MIDI or circuit bending)
• 20 semi- OBS preset rhythms {rock 1, 8 beat 1, 16 beat 1, disco 1, pops 1, slow rock 1, swing, samba, bossa nova, waltz | rock 2, 8 beat 2, 16 beat 2, disco 2, pops 2, slow rock 2, reggae, tango, beguine, march} (selected through 10 OBS buttons + bank switch button)
• 8 OBS sound effect pad rubber buttons {forest, ocean, street, space wars, rainy day, evening, concert hall, wild western} (with additional hold and "fade in/ fade out" pads, apparently also used to set MIDI channels in MIDI mode)
• master volume slider
• separate accompaniment (with rhythm) and sound effect volume slide switches (each 5 steps)
• "210 tone bank" button (to layer any 2 preset sounds for dual voice mode)
• single finger &2 fingered accompaniments (only standard chords, manual chord with rhythm off)
• fill-in &intro/ ending buttons
• tempo +/- buttons (43 steps? )
• wavetable sound generator with sounds based 2 mixed medium resolution loop samples with independent, partly complex algorithmic volume and pitch envelopes. Apparently there is an oversampling feature built-in, because low notes do not turn rough, grainy or hissy but only duller.