Fast answer
Turn Local Control off when a DAW is returning the opsix keyboard's notes to its sound engine.
Try these checks
- Confirm that the DAW receives the opsix's MIDI notes and returns them.
- Set GLOBAL MIDI → Local Control to Off.
- Play again; turn Local Control back on for standalone playing without MIDI return.
Diagnose it
Is there an active DAW MIDI return?
Yes: Use Local Control off for this routed setup.
No: Use Local Control on for direct keyboard playing.
What should happen
The engine receives one note path through the DAW rather than two paths.
Why this happens
Korg documents Local Control off as the remedy for duplicated notes through an external sequencer.
If it still doesn’t work
Check the connections and settings described above. If your device behaves differently, email us with its model, firmware version and the steps you tried.
All opsix fixesMore about opsix
Similar symptoms on other gear
These guides cover other models. Use the instructions for the device you are setting up.
References
Sources & review
Sources reviewed: . Documentation does not replace a physical hardware test.
- opsix Owner's Manual · Korg · E2 · original opsix keyboard · last checked 2026-10-07
Sections reviewed: GLOBAL MIDI, p. 71; local setting, p. 91.