When reading music, one of the first element we will encounter is the time signature. Measures are qualified by two numbers used in the time signature. The number on top indicates the number of beats in each measure:
|2 beats per measure|
|3 beats per measure|
|4 beats per measure|
It is quite common to use the symbol as a time signature to define the measure of .
Translated by Dan Román, revised by Sue Talley.