Chuck,

The easiest way to do this is to download a good midi file of the song you wish to modify. Then, using the keyboard's onboard Song Creator program in combination with the Mixing Console, you can change anything you wish in the song, save the changes, and change them again if you wish.

For changing individual voices, the keyboard's onboard Voice Creator program is a very powerful tool when used in conjunction with the Mixing Console. The modified voices can then be saved to a User area where they can be instantly recalled.

You can find lots of detailed instructions on performing these tasks at www.psrtutorial.com by clicking on the Lessons tab.

Gary