Changes

A note in music is described not only by pitch, or frequency, but also by duration. Notes in Western music have names that typically describe how long they would sound in a typical measure. ''Whole notes'' are so called because normally they would sound for the full measure. ''Half notes'' would sound for half the measure, ''quarter notes'' for a fourth of the measure, and so on. A note may also carry a ''dot'' to the right of it, that indicates that the note is to sound for one and one-half times its usual duration.

A note in music is described not only by pitch, or frequency, but also by duration. Notes in Western music have names that typically describe how long they would sound in a typical measure. ''Whole notes'' are so called because normally they would sound for the full measure. ''Half notes'' would sound for half the measure, ''quarter notes'' for a fourth of the measure, and so on. A note may also carry a ''dot'' to the right of it, that indicates that the note is to sound for one and one-half times its usual duration.

Any one of these notes may carry a beat, and a measure may have any number of beats. Thus every piece of music commonly carries at least one ''time signature'' describing how many beats a measure has, and which type of note carries one beat. The most common time is "four-quarter time" (four beats per measure, with the beat given to the quarter note), which is therefore called "common time." Other commonly used time signature include three-quarter, six-eighth, nine-eighth, or rarely, two-half (called ''Alla breve'' or "cut time"). Even rarer are the time signatures with prime numbers of beats (other than three-quarter), including five-quarter or even eleven-eighth.

Any one of these notes may carry a beat, and a measure may have any number of beats. Thus every piece of music commonly carries at least one [[meter signature|''time signature'']] describing how many beats a measure has, and which type of note carries one beat. The most common time is "four-quarter time" (four beats per measure, with the beat given to the quarter note), which is therefore called "common time." Other commonly used time signatures include three-quarter, six-eighth, nine-eighth, or two-half (called ''Alla breve'' or "cut time"). Even rarer are the time signatures with prime numbers of beats (other than three-quarter), including five-quarter or even eleven-eighth.

''Tempo'' ([[Italian]] for "time") describes how frequently the beats occur. The typical tempo signature is a drawing of the note that has the beat, followed by the number of beats per minute.

''Tempo'' ([[Italian]] for "time") describes how frequently the beats occur. The typical tempo signature is a drawing of the note that has the beat, followed by the number of beats per minute.