 The Yamaha CX5M introduced MIDI support and sequencing in an MSX system in 1984.The spread of MIDI on personal computers was largely facilitated by Roland Corporation's MPU-401, released in 1984, as the first MIDI-equipped PC sound card, capable of MIDI sound processing and sequencing.After Roland sold MPU sound chips to other sound card manufacturers, it established a universal standard MIDI-to-PC interface.