MIDIROCK.XYZ
Korg / Synthesizer

Korg Prophecy

Original Prophecy hardware, with an arpeggiator and configurable MIDI behavior.

Official manual Original hardware keyboard, not the KORG Collection software instrument.
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Reference

Look up MIDI

Find documented settings and capability notes.

Troubleshoot

Fix a problem

Start with the fastest documented checks.

Workflow

Connect gear

See available connection plans and their verification state.

At a glance

MIDI quick reference

MIDI connection
MIDI IN and MIDI OUT
Official manual
Global MIDI channel
1–16, set in GLB-8 [MIDI]
Official manual
Arpeggiator clock
Internal or external MIDI Clock, selected in GLB-8 [MIDI]
Official manual
Local Control
On or off in GLB-8 [MIDI]
Official manual
Program Change
Separate transmit and receive switches in GLB-12; configurable program and bank maps
Official manual
System Exclusive
Receive filter in GLB-15; data dump formats documented in the MIDI implementation
Official manual
Full MIDI reference
Answer first

Common problems

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.
Wiring

Connection plans

Needs physical verification

MIDI Rock on iPhone → Korg Prophecy

Send notes or clock from MIDI Rock to the original Prophecy hardware

View the plan
Needs physical verification

Korg minilogue → Korg Prophecy

Clock the Prophecy arpeggiator from the minilogue

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Needs physical verification

Korg Prophecy → Korg minilogue

Clock minilogue tempo-based functions from the Prophecy

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Needs physical verification

Roland TR-8S → Korg Prophecy

Clock the Prophecy arpeggiator from the TR-8S

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Official resources

Manuals & resources

Prophecy Parameter Guide Prophecy Basic Guide
Provenance

Sources & review

Last desk review: . Documentation does not replace a physical hardware test.

Sections reviewed: GLB-18, p. 147; GLB-8, p. 139; GLB-12–14, pp. 143–144; GLB-15, p. 144; MIDI implementation, pp. 164–170; GLB-12–15, pp. 143–144; GLB-18, pp. 146–148.