Odd time signatures have an odd number of beats per bar. The word "odd" is used in the mathematical sense and does not refer to whether a piece of music sounds unusual. Often pieces sound unusual because of the placement of accents but are actually in common time (i.e. 4/4). Most of songs you will play and most of the examples in enable Guitar are in 4/4 time.

Examples of odd time signatures are 3/4, 5/4 and 7/8:

3/4

3/4 is probably best known as a waltz and is often used in classical music. As with the other time signatures, the top number refers to how many beats are in each bar and not how many notes there are altogether.

5/4

7/8

Other time signatures such as 6/8, 9/8 and 12/8 are dealt with in the compound time section.