History and criticism 3,969 Music 3,748 Vocal scores with piano 1,153 History 1,079 Operas 851 Composers 760 Criticism and interpretation 718 more ... Popular music 698 Scores 654 Social aspects 636 Jazz 489 Musicals 457 Instruction and study 425 Opera 409 Philosophy and aesthetics 363 Songs (High voice) with piano 333 Analysis, appreciation 301 Cantatas, Sacred 301 Music theory 300 Musicians 293 Jazz musicians 282 Librettos 280 Excerpts 275 Rock music 265 Songs (Medium voice) with piano 245 Biography 243 Folk music 224 African Americans 223 Rock musicians 198 Singing 181 less ...