This original MT-32 comes with a preset library of 128 synth and 30 rhythm sounds, playable on 8 melodic channels and one rhythm channel. It also features a digital reverberation effect. Being a synthesizer the MT-32 is very programmable. Sounds are created from up to 4 partials which can be combined in various ways. With 32 partials available overall, polyphony depends on the tonal complexity of the music, and 8 to 32 notes can be played simultaneously.The MT-32 by default does not play on the otherwise most popular MIDI channel 1 (and by consequence neither do midi files targeted for it), but can be reprogrammed to do this, through MIDI system exclusive messages, for example to achieve a certain level of general midi compatibility. This device is in excellent condition, and complete with mains unit and original manuals!