

The pregap of Track 1 is used for Hidden Track One Audio (HTOA). INDEX 01 is required and denotes the start of the track, while INDEX 00 is optional and denotes the pregap. In the context of cue sheets, 'frames' refer to CD sectors, despite a different, lower-level structure in CDs also being known as frames. There are 75 such frames per second of audio. The position is specified in mm:ss:ff (minute-second-frame) format. INDEX - Indicates an index (position) within the current FILE.Some commands that follow this command apply to the track rather than the entire disc. TRACK - Defines a track context, providing its number and type or mode (for instance AUDIO or various CD-ROM modes).FILES - Names a file containing the data and its format (such as MP3, and WAVE audio file formats, and plain 'binary' disc images).
