Essentials of Music In this section you can explore the historical themes, musical context, and stylistic ideas that mark the six major periods of music: Middle Ages, Renaissance, Baroque, Classical, Romantic, and 20th Century. You can also learn about the composers of these periods and explore how musical style changed from era to era. Essentials of Music from Sony Classical and W.W. Norton. Basic information about classical music, including eras, terms and composers, with audio examples classicalcomposerserasessentialsglossaryhistorymusicmusicalnortonsonytermsw.w By NemSysin Arts > Musicwith erastheory_of_musicby 8 users