Set GLOBAL MIDI Clock to External or Auto, then check that the sender is actually transmitting clock over DIN or USB.
Try these checks
- Open GLOBAL MIDI and inspect Clock.
- Choose External for a dedicated external-clock setup, or Auto for fallback to the internal tempo.
- Start clock transmission at the sender. Check Rx Transport separately if you also want incoming transport.
Diagnose it
Is Clock set to Off or Internal?
Yes: Choose External or Auto to follow incoming clock.
No: Check the sender; External needs a running clock.
What should happen
Tempo-related features follow the incoming clock when it is present.
Why this happens
The documented clock modes distinguish internal timing, external timing and automatic fallback.
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.
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, pp. 71–72; synchronization, p. 91.