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Korg / Synthesizer

Korg opsix

Original opsix ignoring external clock or doubling notes through a DAW? Check clock source, transport reception and Local Control.

Manufacturer documented Original opsix keyboard, Owner's Manual E2 scope. Not opsix native, module or mkII; later revisions and physical connections are not verified here.

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At a glance

MIDI quick reference

Clock choices
Off, Internal, External and Auto.
Manufacturer documented
Clock input
External can follow incoming DIN or USB MIDI clock.
Manufacturer documented
Local keyboard
Local Control changes the direct keyboard-to-engine path.
Manufacturer documented
Start/stop reception
Rx Transport has its own switch.
Manufacturer documented
Full MIDI reference
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Common problems

Manufacturer documented
opsix won't follow external MIDI clock
Off and Internal do not select incoming clock.Manufacturer documented
opsix plays doubled notes when a DAW returns MIDI
Remove the direct keyboard path when using sequencer loop-back.
Official resources

Manuals & resources

opsix Owner's Manual

Korg · E2 · original opsix keyboard · last checked 2026-10-07

References

Sources & review

Sources reviewed: . Documentation does not replace a physical hardware test.

Sections reviewed: GLOBAL MIDI, p. 71; Synchronization, p. 91; GLOBAL MIDI, p. 72; GLOBAL MIDI, p. 71; synchronization, p. 91; GLOBAL MIDI, pp. 71–72.