
If you're on a Mac:
- Open the Applications > Utilities > Audio MIDI Setup app
- Click Window > Show MIDI Studio
- At the top of the window, click the drop-down menu and select New Configuration...
- Give it a name (eg. 2022) and click OK
- Click the IAC Driver (should be red) and press the Delete key on your keyboard
- Close the Audio MIDI Setup application
- Open rekordbox
- Click the MIDI button
- Click the Defaults button at the bottom of that window
- Click no to saving the settings
If you're on a PC:
- Open rekordbox
- Click the MIDI button
- Click the Defaults button at the bottom of that window
- Click no to saving the settings
For either:
- Make sure you have no other MIDI applications running. Really, there's no "piano" function in rekordbox, so it's potentially external.