Open Music System (OMS) was a virtual studio management application by Opcode for the Classic Mac OS. Similar to FreeMIDI by Mark of the Unicorn and Audio MIDI Setup by Apple, OMS used a GUI to manage MIDI devices by providing DAW applications and the Mac OS with information regarding the physical setup of MIDI devices connected to the computer.
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Last revised Jun 10, 2026
Open Music System
Open Music System (OMS) was a virtual studio management application by Opcode for the Classic Mac OS. Similar to FreeMIDI by Mark of the Unicorn and Audio MIDI Setup by Apple, OMS used a GUI to manage MIDI devices by providing DAW applications and the Mac OS with information regarding the physical setup of MIDI devices connected to the computer.