Thank you Sokratis and TedS.

TedS, I use the "On Bass" feature on the Yamaha arranger, which unfortunately is missing in the Korg. You can see my set up in the YouTube videos. When I have some time I will post pictures also.
Feel free to contact me by mail if you need any information.
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Victor

Korg Pa3x 61 - Mediastation X76 - Yamaha Psr s900 - Korg Tr61 - Roland PK5A - NanoKontrol - Ensoniq SQ1 - Yamaha D85 organ