The high-pitched voices of the characters is normal in the Japanese anime universe that BlazBlue: Calamity Trigger was created for and if you have played this type of game before, than if will probably be a welcome sound. Gamers who haven't played this type of game before will probably be a little surprised the first time they experience it for a few hours.
The sound track was excellent, with songs you're probably not going to recognize, but they were excellent in improving the entertainment value of the game play and story.