I noticed that when I went to Score Manager to add voices to a choral work, that some were coming up SmartMusic and others Garriton.. When I changed them all to Garriton, there was no sound in playback. When I changed them to SmartMusic, I get sound, but it sounds like a cheap Casio.. Under playback, which am I supposed to be using? And it if is Garriton, then how do I default that and get sound?