Here's what he said about it:

"The whole thing was played on the Tyros 4 with some help of a program that was designed by East and West Orchestra and Choirs. All the sounds have been played by myself and combined by me using some of the sounds from the Tyros and the program.

This whole theme took me in total 4 weeks to achieve and to get the right sounds. I have a few more that i will share with you in the very near future. At the moment the Tyros 4 has a glitch so im using the Tyros 3 until the 4 is back from being repaired."