Troubleshooting
Korg Prophecy fixes
Choose the symptom you see. Each answer is tied to its documented source and verification state.
Official manual
Prophecy arpeggiator won't sync to external MIDI clock
The arpeggiator runs at its own speed or does not start with your external clock.Official manual
Prophecy keyboard makes no sound after a MIDI setup
The keys still transmit MIDI, but the Prophecy itself is silent.Official manual
Prophecy notes trigger twice with a sequencer
A sequencer returns the same notes you play to the Prophecy.Official manual
Prophecy is not responding to incoming MIDI notes
An external keyboard or sequencer sends notes, but the Prophecy does not play.Official manual
Prophecy ignores Program Change messages
A sequencer sends a patch change but the expected program is not selected.Official manual
Prophecy does not receive SysEx data
An editor or librarian sends System Exclusive data that the Prophecy ignores.
Prophecy arpeggiator won't sync to external MIDI clock
The arpeggiator runs at its own speed or does not start with your external clock.Official manual
Prophecy keyboard makes no sound after a MIDI setup
The keys still transmit MIDI, but the Prophecy itself is silent.Official manual
Prophecy notes trigger twice with a sequencer
A sequencer returns the same notes you play to the Prophecy.Official manual
Prophecy is not responding to incoming MIDI notes
An external keyboard or sequencer sends notes, but the Prophecy does not play.Official manual
Prophecy ignores Program Change messages
A sequencer sends a patch change but the expected program is not selected.Official manual
Prophecy does not receive SysEx data
An editor or librarian sends System Exclusive data that the Prophecy ignores.