56 lines
1.1 KiB
Markdown
56 lines
1.1 KiB
Markdown
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# Vail MIDI Protocol
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When it boots,
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the Vail adapter sends left and right Control keyboard key up and down events.
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It also shows up as a MIDI device.
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The Vail web site sends MIDI control commands to enable MIDI keyer mode,
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tells the keyer what sideband pitch to generate,
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and can set the keyer mode.
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## Controller 0 - MIDI Mode
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`b0 00 ff` will enable MIDI mode and disable Keyboard mode
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`b0 00 00` will enable Keyboard mode and disable MIDI mode
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## Controller 1 - dit length
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`b0 00 xx` will set the dit duration to `xx` times 2 milliseconds
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## Controller 2 - sidetone note
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`b0 00 xx` will play note `xx` as the sidetone note
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## Program Change
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`c0 xx` will change the keyer mode to `xx`.
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### Keyer Modes
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* 0: passthrough (sends C# and D for dit and dah)
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* 1: cootie / straight key
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* 2: bug
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* 3: electric bug
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* 4: single dot
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* 5: ultimatic
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* 6: plain iambic
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* 7: iambic a
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* 8: iambic b
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* 9: keyahead
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Any other mode will set to passthrough.
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## Notes (key down / key up)
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`90 00 xx` will begin playing note `xx`
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`80 00 xx` will end playing note `xx`
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These work just like a regular MIDI synthesizer.
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