[linux-audio-dev] Basic MIDI question

Alfons Adriaensen fons.adriaensen at alcatelaleniaspace.com
Wed Jul 26 12:06:50 UTC 2006

On Wed, Jul 26, 2006 at 01:25:38PM +0300, Ari Kauppi wrote:

> Good try but it still has at least one potential problem: according to 
> MIDI spec running status should be set only with channel messages. 
> Sysex/common messages should reset it to undefined (0).

I don't have a midi spec at hand here. Do you mean running status
is shared by all channels and not per channel ? This would make
it less than trivial to combine or split midi streams.

Say chan 1 has set RS to some value, and the next command on this
channel doesn't have a status byte but uses the RS. Now we merge in
a second channel that modifies RS in between the two commands on chan 1.
Suddenly the second one of those _does_ need a status byte...


Lascia la spina, cogli la rosa.

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