hi kla4: As with all my songs produced on Tyros2, I utilized the T2's built in vocal harmonizer exclusively, recording my live performance straight to (no multi-tracking or overdubs) the T2's hard drive utilizing the T2 digital audio hd recorder. No post processing was made. The resultant WAV file was simply converted to WMA (windows media audio) format for more convenient (smaller file size) web hosting. - Scott