There are different kinds of meter signatures, the most commonly used are:
4/4 Meter - Also known as common time, this means there are 4 beats in a measure. For example 4 quarter notes (= 4 beats) in a measure will have the count - 1 2 3 4. Another example is when there is a half note (= 2 beats), 2 eighth notes (= 1 beat) and 1 quarter note (=1 beat) in a measure. When you add the beats of all the notes you come up with 4, you thus count it as 1 2 3 4. In 4/4 meter the accent is on the first beat. Listen to a music sample with a 4/4 meter.
3/4 Meter - Used mostly in classical and waltz music, this means there are three beats in a measure. For example 3 quarter notes (= 3 beats) will have the count - 1 2 3. Another example is a dotted half note which is also equivalent to three beats. In 3/4 meter the accent is on the first beat. Listen to a music sample with a 3/4 meter.
6/8 Meter - Mostly used in classical music, this means there are 6 beats in a measure. In this type of meter the eighth notes are commonly used. For example 6 eighth notes in a measure will have the count - 1 2 3 4 5 6. Here the accent is on the first and fourth beats. Listen to a music sample with a 6/8 meter.


