Changes
MIDI
,/* Software Protocol */
| 0xA || Polyphonic Key Pressure || 2 || Adjusts pressure on one note; data bytes are note number (0–127) and pressure value (0–127).
|-
| 0xB || Control Change || 2 || Changes a controller (e.g., volume, pan, modulation); data bytes are controller number (0–127) and value (0–127).
|-
| 0xC || Program Change || 1 || Switches instrument; data byte is program number (0–127, e.g., piano, guitar).
