An advanced version of the Casio VL-Tone 1 and PT-1, it also includes a melody guide lighting feature for music teaching and a ROM- Pack music cartridge slot.  Unlike the multi-octave VL-1, the PT-82 keyboard is limited to just the octaves on the keyboard.

main features:

• 32 mini keys
• built-in speaker (with unpleasant, loud mid-range resonance)
• monophonic main voice
• 8 OBS preset sounds {violin, organ, harpsichord, piano, celesta, trumpet, clarinet, flute}
• 12 preset rhythms {rock, disco, 16 beat, swing 2 beat, swing 4 beat, samba, bossa nova, beguine, tango, march, slow rock, waltz}
• volume switch (5 steps)
• tempo +/- buttons (16 steps?)
• ROM- Pack music cartridge slot for melody guide and “auto play” (jukebox mode)
• “melody guide” keyboard play training feature with key lighting (32 red & green LEDs above the keys), 4 levels and automatic rating
• 2 “one key play” buttons (to step note by note through ROM musics)
• semi- analogue sound generator similar like VL-1 (only monophonic keyboard play, but additional 4 note polyphonic accompaniment during automatic ROM music play). The digital envelopes (with audible zipper noise) are linear and thus sounds unrealistic because they fade silent too soon.
• rhythms consist of dull and distorted digital (squarewave?) blips + simple shift register noise {base, low tom, high tom, snare, cymbal}
• CPU= “HD61703B01, 5L  13″
• tuning adjustment trimmer
• headphone and power supply jack