PortaSound MK-100

A portable keyboard equipped with a feature that creates voices by combining waveforms and envelopes like a synthesizer.
The PortaSound MK-100 features a mini-keyboard and is equipped with Auto Bass Chord and the Music Programmer feature.
The unit stores chords and melodies separately, and is capable of simultaneous playback.
It also has a cassette interface for storing voices and performance data digitally on cassette tapes.