midi - Building a sysex message in Java for Garage band -

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i trying control garageband sequencer sending midi messages java program. works shortmessage. example, can record c3 in garageband in way :

shortmessage mymsg = new shortmessage(); mymsg.setmessage(shortmessage.note_on, 0, 60, 93); receiver receiver = midisystem.getreceiver(); receiver.send(mymsg, -1);

now send sysex message "control" sequencer, example, start recording. building sysexmessage harder shortmessage since requires build array of bytes. in particular, 1 must specify "manufacturer id". looking informations on web issue gave me feeling not going in right direction because nothing seems clear. familiar problem ?

sysex messages can create byte array:

byte[] mmcstart = new byte[]     { (byte)0xf0, 0x7f, 0x7f, 0x06, 0x02, (byte)0xf7 }; sysexmessage mymsg = new sysexmessage(mmcstart);

manufacturer ids used prevent conflicts when using vendor-specific messages. standardized messages use reserverd manufacturer ids 7e (for non-realtime messages) or 7f (for realtime messages).

please note that, in addition mmc start message, there plain midi start message (shortmessage.start).

however, garageband supports neither; see garageband control codes.


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