I know you can get them on a usb stick from Korg.de for the pa800 and pa2x. don't know if they will work for the pa3x. They sell a pa3x musikant keyboard, and as they did with the pa500 series (I have the musikant), the stick probably won't work with the 3x so you will buy the keyboard. I can see if mine will allow me to export the styles to an sd card, but I am just familiarizing myself with it.
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The older I get, the better I was..