[gmpi] Re: MIDI: Common event coding

On Wed, Jun 23, 2004 at 11:52:36 -0700, Chris Grigg wrote: 
 Steve said:
 >On Wed, Jun 23, 2004 at 10:31:55 -0700, Tim Hockin wrote:
 >> This is partly why I dislike the idea of stapling MIDI onto events.  If
 >> the GMPI protocol is well designed, it's not needed, and is just a
 >> crutch.  Ever seen a (young) music student go through his sheet music and
 >> write the note names under the notes?  He never learns to read music very
 >> well. Not that I know that young oboe player, or anything :)
 >
 >Right, I dont think its the sort of thing that plugins should depend on.
 >Though, IIRC Chris descibed it as "optional" sould it would presumably be
 >a bug if a plugin depended on it? Still seems a bit odd.

No, it would be a feature. 8-)

 This is how MIDI routing and MIDI processors would work inside the
 GMPI graph.  For events that originate as MIDI, hosts that expose
 MIDI into the graph should staple the original MIDI to the expanded
 message, until and unless the two side come un-sync'd.


But if you process the MIDI side only then they have just become unsync'd,
and if you need to process both then why have the stapled MIDI at all?
I'm not sure what it achieves.

- Steve

Not all the plugs are going to change all the messages. Many will not change any messages at all. Only those that do will be responsible for re-syncing the big part of the message to the MIDI. If you throw away the MID part, you force unnecessary conversions at every stage.

--- Chris G.

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