The beat is what you clap your hands to. It is something you feel.
On paper the beat is beamed. There are three beats in this example.
![]()
During a waltz you may turn to 123 - 123. In a waltz there are three beats to each natural accent. The natural accent is on 1. A march is counted 1234 - 1234. The natural accent falls every four beats on 1. Most music has a natural accent every 2, 3 or 4 beats.
On paper the natural accent is drawn as a barline. A barline is a lone vertical line cutting through the stave at regular intervals.

What happens between each barline is called a bar or measure. We number each bar, the bar number or a measure number.
The time signature is usually drawn as one note above another. It goes between the key signature and first note of music.
Here are some examples. [ Roll your mouse over the stave for interactivity. ]
The
top number is 2. The bottom number is 4. There are two quarter notes
to the measure. A quarter note is a crotchet. From the beams you
can see there are two crotchet beats to the measure. There is a
natural accent every two beats.
The
top number is 3. The bottom number is 4. There are three quarter
notes to the measure. There is a natural accent every 3 crotchet
beats.
The
top number is 4. The bottom number is 4. There are four quarter
notes to the measure. The natural accent falls every 4 crotchet
beats.
This
time there are no numbers to the time signature. The time signature
is C. C is short for Common Time. It is a fancy way of saying 4
crotchet beats to the bar. It is identical to 4 - 4.
C
with a stroke through it is Cut Common time. Cut common time is
four crotchets, two beats to the bar. You will learn more about
cut common time later.
The
top number is 6. The bottom number is 8. There are six quavers (eighth
notes) to the bar. Each beat is three quavers (one and a half crotchets).
There are two beats to the measure. There is a natural accent every
two beats.
The
top number is 12. The bottom number is 8. There are twelve quavers
(eighth notes) to the bar. Each beat is three quavers (one and a
half crotchets). There are four beats to the measure. There is a
natural accent every four beats.
"Become an arranger first, then an orchestrator, and then a composer." - Joe Paparone

Joe Paparone is an Australian music arranger of the highest international calibre. Allow him to share 35 years of real world experiences with you.