Types of Events on an Audio CD

There are three types of events that can be used to specify various sections of audio on the CD.

Track start

There can be up to 99 tracks on one CD. Each is identified by its start point only.

Track sub-index

On advanced CD players, a track can be divided into sub-indexes (sometimes called only indexes). These are used to identify important positions within a track. There can be 98 sub-indexes in each track. However, because it is difficult and time-consuming to search for and locate to a sub-index, many CD players ignore this information.

Pause

A pause is added before each track. Pauses can be of variable lengths. Some CD players indicate the pauses between tracks on their displays.