I have previously owned Korg i3 & i30. Both of these require a Style in Cmaj7 NOT C. The Cmaj7 is required to trigger the accompaniment between C and adding the B in Cmaj7. Other wise you hear no difference when playing a 7th. Even the Korg Instruction book informs you of the Cmaj7 being required to make up a Korg Style.

If all manufactures followed the Yamaha method of producing Style Files as a Midi File we would not need a conversion program at all.

Graham UK