|Most popular music is written in 4/4 time, otherwise known as common time and denoted by the letter "C". However, many other time signatures are frequently used.|
Waltz time generally consists of either three quarter notes per measure (3/4), or six eight notes per measure (6/8). Dave Brubeck's famous jazz composition Take Five was written in 5/4 time.
Time signatures can also change during the course of a single composition. The end of Igor Stravinsky's The Rite of Spring is notable for its frequent changes in meter.
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