I currently use a Roland MC-80 to playback midi sequences, I then load the SMF to the Tyros, and the playback is not as good as the Roland's.

I am assuming the Tyros uses a GM soundset for SMF playback, (which is poor ) can I have the Tyros instantly re-voice to use the Tyros better voices or do I have to go into each program change and put it in myself?