I could not do that on my Yamaha PSR 3000, except by using an external program. I don't know Style Compiler at all, but I'm sure it should be able to do this.
The PA3X can maybe do this, but then it cannot play audio styles. All products have their weak & strong points, and in my opinion, the Audya has more strong points than any other make out there...
Henni
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Make sure you'll fly forever!