Have you used the Korg config software to set the LED mode to "external"? If you haven't done that, the NanoKontrol2 won't respond to external LED messages.
There's a bit more detail on that and a link to the Korg config software on the forum page for my Nanokontrol2 mapping: http://www.mixxx.org/forums/viewtopic.php?f=7&t=4759
Have you used the Korg config software to set the LED mode to "external"? If you haven't done that, the NanoKontrol2 won't respond to external LED messages.
There's a bit more detail on that and a link to the Korg config software on the forum page for my Nanokontrol2 mapping: www.mixxx. org/forums/ viewtopic. php?f=7& t=4759
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