Garageband

Welcome to your personal recording studio — where it’s easy to make a song whether you’re a first-time musician or a seasoned pro. With GarageBand, you can create your own virtual onstage band and play along on your favorite instrument. You can record, edit, and mix a song exactly as you want it, in pristine CD quality. It’s the perfect place to get your act together. (source: http://www.apple.com/ilife/garageband/)