TODO

devices
- enable / disable
- show messages / hide messages
  - hide: messages are still recorded, but not displayed
display messages in chronological order (last message at bottom) or reverse order (last message at top)
max number of messages
filters
colors
number of messages received
- total
- per port
hex / dec
download sysex as file

MIDI

message type
- channel message
  - channel voice (0x80 - 0xEF)
    - 0x8n 1000nnnn, 2 data bytes : Note Off
    - 0x9n 1001nnnn, 2 data bytes : Note On (a velocity of zero = Note Off)
    - 0xAn 1010nnnn, 2 data bytes : Polyphonic Key Pressure (Aftertouch)
    - 0xBn 1011nnnn, 2 data bytes : Controller, first data byte = 0-119
    - 0xCn 1100nnnn, 1 data byte : Program Change
    - 0xDn 1101nnnn, 1 data byte : Channel Pressure (Aftertouch)
    - 0xEn 1110nnnn, 2 data bytes : Pitch Bend
  - channel mode (subset of 0xBn)
    - 120 All Sound Off
    - 121 Reset All Controllers
    - 122 Local Control On/Off
    - 123 All Notes Off
    - 124 Omni Mode Off
    - 125 Omni Mode On
    - 126 Mono Mode On (Poly Off)
    - 127 Poly Mode On (Mono Off)
- system message
  - system exclusive (0xF0)
    - 0xF0 Start of System Exclusive (SOX)
    - 0xF7 End of System Exclusive (EOX)
  - system common (0xF1 - 0xF7)
    - 0xF1 MIDI Time Code Quarter Frame
    - 0xF2 Song Position Pointer
    - 0xF3 Song Select
    - 0xF4 Undefined
    - 0xF5 Undefined
    - 0xF6 Tune Request
    - 0xF7 End of System Exclusive (EOX)
  - system realtime (0xF8 - 0xFF)
    - 0xF8 Timing Clock
    - 0xF9 Undefined
    - 0xFA Start
    - 0xFB Continue
    - 0xFC Stop
    - 0xFD Undefined
    - 0xFE Active Sensing
    - 0xFF System Reset