Music theater Operas 18 Ballets 8 Electronic music 7 History and criticism 7 Instrumental ensembles 6 Orchestral music 5 more ... Songs (High voice) with instrumental ensemble 5 Vocalises with instrumental ensemble 5 Mixed media (Music) 4 Music 4 Song cycles 4 Vocalises (Vocal ensemble) with instrumental ensemble 4 Choruses, Sacred (Mixed voices) with instrumental ensemble 3 Masses 3 Musique concrète 3 Opera 3 Piano music 3 Vocalises (Vocal ensemble), Unaccompanied 3 Aleatory music 2 Avant-garde (Music) 2 Cantatas, Secular 2 Chamber music 2 Choruses, Secular (Mixed voices) with instrumental ensemble 2 Choruses, Secular (Mixed voices) with orchestra 2 Choruses, Secular (Women's voices) with instrumental ensemble 2 Eddas 2 Fiddle tunes 2 Folk music 2 Folk songs, Icelandic 2 less ...