Polytonality (also polyharmony) is the musical use of more than one key simultaneously. Bitonality is the use of only two different keys at the same time...

List of pieces using polytonality and/or bitonality. Samuel Barber Symphony No. 2 (1944)[citation needed] Béla Bartók Mikrokosmos Volume 5 number 125:...

movement. The piece is notable for one of the earliest known uses of polytonality (though not the earliest, being predated by Heinrich Ignaz Franz Biber's...

chords to imply a polytonality (D major 7 over C major 7: CEGBDF#AC#) with the improvisation based on an alternating polytonality and an altered dominant...

polyrhythmic accompaniment," the composition combined Afro-Cuban rhythm with polytonality and preceded further use of modality and avant-garde harmony in Latin...

each implying a polytonality (D major 7 over C major 7: CEGBDF#AC#) with the improvisation based on alternating lydian-ish polytonality and an altered...

only new experiment in tonality. Darius Milhaud developed the use of polytonality, that is, music where different instruments play in different keys at...

used. An added tone such as fourth voiced below the root may suggest polytonality. The practice of adding tones may have led to superimposing chords and...

side-stepping or side-slipping, superimposition of Coltrane changes, and polytonality. The term outside is commonly used by jazz musicians playing in a post-bop...

are influenced by jazz and Brazilian music and make extensive use of polytonality. Milhaud is considered one of the key modernist composers. A renowned...