Check MIDI OUT → Prophecy MIDI IN, then match the sending channel to GLB-8 [MIDI] → Global Channel. Korg lists both checks for failed MIDI control.
Try these checks
- Check that the external device's MIDI OUT is connected to the Prophecy's MIDI IN.
- Inspect GLB-8 [MIDI] → Global Channel and send notes on that channel.
- If you intentionally need to receive from any channel, GLB-8 → Omni ON permits that; return to a defined channel for a predictable multi-device setup.
Diagnose it
Is the cable connected from the sender's OUT to the Prophecy's IN?
Yes: Compare the sender's channel with Global Channel in GLB-8.
No: Correct the cable direction and test again.
Do the sending channel and Global Channel match?
Yes: Check whether the sender is actually transmitting notes and whether the Prophecy's audio path works.
No: Set matching channels, or deliberately use Omni ON.
What should happen
Incoming notes play the Prophecy on the selected channel.
Why this happens
With Omni OFF, the Prophecy receives on its Global Channel; Omni ON accepts any incoming channel.
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 Prophecy fixesMore about Prophecy
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.
- Prophecy Parameter Guide · Korg · last checked 2026-09-26 · Open PDF
Sections reviewed: GLB-8, p. 139; Troubleshooting, p. 175.