PA500 has different format,so you can't.Just like PA2x and pa800 styles you can't load in pa1x.
Only with conversion,but you know how that goes.
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MIKIMIKI
TYROS 5,BEHRINGER X32PRODUCER,YAMAHA DSR112,JBL PRX618s XLF,EV ZLX12p,SENNHEISER E945,....ETC