Digital drums that could use any MIDI instrument as a sound source

The DZ-SYSTEM was developed with the aim of enabling the diverse range of tones of electronic musical instruments to be triggered by hitting the digital drums. In doing so, Casio enabled the drums to be played using the sound source of another electronic instrument with MIDI ports. While drums tend to be thought of as instruments used to beat out a rhythm, this model encouraged their evolution into instruments capable of a wider range of musical expression.