static get CHANNEL_MESSAGES() {

    return {
      noteoff: 0x8,           // 8
      noteon: 0x9,            // 9
      keyaftertouch: 0xA,     // 10
      controlchange: 0xB,     // 11
      programchange: 0xC,     // 12
      channelaftertouch: 0xD, // 13
      pitchbend: 0xE          // 14
    };

  }
Enumeration of all MIDI channel message names and their associated 4-bit numerical value:

| Message Name        | Hexadecimal | Decimal |
|---------------------|-------------|---------|
| `noteoff`           | 0x8         | 8       |
| `noteon`            | 0x9         | 9       |
| `keyaftertouch`     | 0xA         | 10      |
| `controlchange`     | 0xB         | 11      |
| `programchange`     | 0xC         | 12      |
| `channelaftertouch` | 0xD         | 13      |
| `pitchbend`         | 0xE         | 14      |

@enum {Object.<string, number>}
@readonly
@since 3.1
@static