Pedro Lopez-Cabanillas wrote: > 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. >
Checksums are not always used for simple parameters, I guess they are used for complete dumps and the model number or device number also could have a FLOSS-twin. For e.g. the Matrix-1000 you can have several Oberheim Matrix-1000 and give them device numbers, so that only one Matrix-1000 will use received data. It would be really good if there would be a first ID for FLOSS, but there isn't, so it might be the best way to make this ID changeable by the GUI. _______________________________________________ Linux-audio-dev mailing list [email protected] http://lists.linuxaudio.org/mailman/listinfo/linux-audio-dev
