Advanced Higher February Revision 27: Bitonality / Polytonality

Bitonality / Polytonality 

Music which is in 2 (bitonality) or several (polytonality) keys at the same time. A feature of some 20th Century / contemporary music.

Listen to this example of bitonality, a piano piece by Bartok. 

Notice that in this piano music by Prokofiev there is a different time signature for each hand.

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