1. Connect your MIDI keyboard using either USB MIDI or a 5-Pin MIDI cable.
2. Navigate to the Menu screen, then choose Global Settings > MIDI tab.
3. Make sure the MIDI Channel is set to Omni.
4. On the rig screen, tap on an empty block and select Vocal > Vocal Harmony > Auto High.
5. Double tap the Harmonizer block to access its settings page, then set the Auto Src field to MIDI.
6. Tap the onscreen ">" button to access voice settings.
7. When setting the Mode field, ensure that either Auto, Auto Root, or Root & Scl are selected.
8. When setting the Pitch field, please ensure High, Higher, Highest, or Low, Lower, Lowest is selected.
9. To edit the other voices, please use the onscreen ">" button.
10. Following this, the Vocal Harmony pedal will correspond to keys held down on your MIDI keyboard.