keyboard hum when controller cabled to sound module

[Jepse]

Hi, I have the outputs 1 and 2 of my Korg O3R/W going into aux ins of my digital piano and notice a hum like there is some sort of interference. Take the cables out-- no hum. Both cables cause it so any ideas?

Thanks

[LurkerAtTheThreshold]

Try using a ground lift adaptor on the O3R/W.
Hope that helps.

[Jepse]

Thanks Matthew, before I try that I'll make sure the two devices are plugged in the save circuit. Apparently this can cause problems as well.

Jepse