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The MIDI Forum

  Wednesday, 09 August 2017
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Hello,

Can real time messages interrupt normal messages? For instance can a noteon message be interrupted by an active sensing or a song position pointer? If yes, can a real time message be interrupted by another one? I ask because reading the midi message description, it seems that it is possible to write a driver like this.

Pierre
6 years ago
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#865
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I've found the answer here:

Interleaving

interleaving.png
Yes, real time messages can interrupt other messages, as you already have found. The other way around: system real time messages are all 1 byte long, so by design they can't be interrupted by other messages. There are also longer Universal System Exclusive real time messages that shouldn't be interrupted, IMHO.
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