The KMidi Handbook
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# 4.3. Midi Implementation

Almost all midi messages and controllers that I'm aware of are implemented somehow (meaning that they cause something to happen, if not necessarily the right thing). NRPN controllers for setting attack and decay time are not implemented, because I haven't found any midi files that use them. The flanging controller is not implemented (though flanging requested in an XG sysex dump is implemented). Only a few of the hardware oriented controls in Roland and Yamaha system exclusive dumps are implemented.

TiMidity can handle midi files meant to play on up to four synthesizers, keeping separate the four sets of 16 channels for each synth. However, in the midi file, the synths have to be selected using port commands (in either Roland-GS or Yamaha-XG sysex dumps). Some midi files intended for multiple synths don't have port commands. (The info window shows port commands when present.)

The KMidi vertical-bar display of channel activity is limited to two sets of 16 channels. The channel chart of patches with horizontal bars for controller values is limited to just one set of 16 channels.

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