Midinotes posted this at the Korg forum:

Some great new demos of the PA900 uploaded by MuzyKuj.com.... I am eager to hear all the demos anyone can find of this amazing new arranger!


DNC voice demo
http://www.youtube.com/watch?v=q1VmXKJHEIo

Pianos
http://www.youtube.com/watch?v=UVnHZhbYeNA&feature=c4-overview&list=UUYyELSMBdjeKpieusbHxqAw

Styles (3 of)
http://www.youtube.com/watch?v=GpJE66ariAM&feature=c4-overview&list=UUYyELSMBdjeKpieusbHxqAw

Helicon vocal harmoniser
http://www.youtube.com/watch?v=x8vaszVrG-o&feature=c4-overview&list=UUYyELSMBdjeKpieusbHxqAw

There is also a good review on the website with more audio samples which you can translate using Chrome browsers or Google from Polish to English if need be....

http://www.muzykuj.com/testy/instrumenty-klawiszowe/korg/korg-pa-900,443-page-1.html