Blaze,
I've been waiting to talk to my friend at Korg USA who is the product manager for arranger products. He's out of the office until Monday.
However, I received a copy of Music Inc., a magazine for music store retailers and there is an article about the new Korg Pa1X which states:
"A built-in 16 MB sampler can read WAV, AIFF, and Korg or Akai samples/multisamples. and utilizes the company's new RX Technology, producing a detailed, sophisticated, natural sound."
George Kaye
Kaye's Music Scene
Reseda, California