Demo of what ??
If you mean my new set for the PA-80/50 , you can simply download it for free : www.irishacts.com
or I can send it to you, that is if you own a PA.
As to mp3s you can listen to some of my older stuff recorded with the Korg PA-80 at: http://artists.iuma.com/IUMA/Bands/Smies/

john