Labels:text | screenshot | font | diagram | line | parallel | number OCR: 33 34 15 What is Music? Music since 1945 16 Plainsong and Polyphony The Symphony Orchestra and its Instruments 12 Music of the Baroque Opera 13 18 The Classical Period Folk Music 19 Music of the Romantics Popular Music in the 20th Century 43 Modernists and Others Music from around the World 25 PH 28