Welcome to the club, Janez.

I have played oberkrainer music myself both on trumpet and keyboards. In those days I owned a GEM arranger and they also sell special oberkrainer sound & styles disks. Very authentic. Nowadays I play a Roland G1000 that comes with some workable oberkrainer styles as well.
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Arno Thijssen
mailto:arnothijssen2002@yahoo.com