Readily available software designed for the production of music can be adapted easily to the physics classroom. Programs such as Apple's GarageBand access large libraries of recorded sound waves that can be heard and displayed both before and after alterations. Tools such as real-time spectral analysers, digital effects, and audio file editors enable a wide variety of sound demonstrations. This article is intended to serve two purposes. First, it will distil from the many capabilities of music production software those capabilities that are most essential to the physics instructor. Secondly, this article will suggest some of the many possible classroom applications of this software. (Contains 2 figures.)