How Time Signatures Work in Music

Music customarily has two numbers at the commencement, one on top of the other. This is called a time signature. The time signature tells how many beats there are in a measure (the space between bar lines), as well as what the prevailing pace (rhythm) of a song will be.

Bar lines are vertical lines that intersect the complete stave at routine intervals. The end of a piece of music is indicated by a double bar line.

The top number of a time signature shows how many beats are in a measure. The bottom number tells the type of note that makes up each beat.

The commonplace time signature in popular music is 4/4 (four beats in each measure, and each beat is made up of a quarter note). Occasionally 4/4 time is indicated with a large "C" centered vertically on the stave at its starting point (which stands for "common time").