The Future of MIDI
A new version of MIDI tentatively called "HD Protocol" or "High-Definition Protocol" has been under discussion since 2005, when it was announced as "HD-MIDI". This new standard offers full backward compatibility with MIDI 1.0 and is intended to support higher-speed transports, allow device discovery and enumeration, and provide greater data range and resolution. The numbers of channels and controllers are to be increased, new kinds of events are to be added, and messages are to be simplified. Entirely new kinds of events will be supported, such as a Note Update message and Direct Pitch in the Note message which are aimed at guitar controllers. Proposed physical layer transports include Ethernet-based protocols such as Audio Video Bridging and Architecture for Control Networks. The HD Protocol and a User Datagram Protocol (UDP)-based transport are under review by MMA's High-Definition Protocol Working Group (HDWG), which includes representatives from all sizes and types of companies.
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