The most primary and immediate musical instrument is something that everyone can use and costs nothing: the human voice. Voice is a valuable intuitive and easy to use tool for understanding music as well as the "voices" of other instruments. In this section, you will be given some basic information on the physiology of the voice. Additionally, you will be provided with resources on the construction of musical instruments. Finally, this section provides resources not only on European instruments, but other instruments from around the world as well.