On Monday, October 5, 2009, Fons Adriaensen wrote:
> On Mon, Oct 05, 2009 at 07:00:40PM +0200, Pedro Lopez-Cabanillas wrote:
> > The MMA requires that you use a registered manufacturer ID, but only for
> > commercial products. There is a special ID = 0x7D that is intended for
> > educational or development use only, and should never appear in a
> > commercial design.
>
> Where it is silently assumed that 'educational' and 'development'
> implies 'not distributed', or at least 'never used together with
> any other app using the same ID'.
>
> If two or more open source programs use 0x7D and they happen to
> see the same MIDI stream then one of them will be screwed.
The only devices or programs that would be screwed are those bad or poorly
designed/written.
In addition to the manufacturer ID, there should be enough additional bytes to
uncertainly identify a particular model among others using the same
manufacturer ID. The device (soft in this case) receiving a message should be
able to distinguish between legitimate and spurious messages using the model
ID bytes, checksums and/or some other mechanism.
Regards,
Pedro
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Received on Wed Oct 7 00:15:03 2009
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