perhaps it is your mixer channels. Since you didn't list what you tried already (and I don't blame you)...plug the Korg in different mixer channels. Make sure your cables are seperated, especially from power supplies...try different midi cables and audio cables...The first thing I would do is unplug everything and then only plug the korg into the mixer. If there is noise than change channels and cables. If there is no noise I would plug the midi direct to PC if possible...check for noise. Plug a headphone into Korg...is there noise? Plug the midi into midibox...if noise change cables/ or ins/outs. This might isolate the problem. Try to have everything seperated from each other. If there is no noise then bring everything together and see if it appears...

[This message has been edited by WS (edited 01-05-2002).]