Disc At Once or DAO is a CD or DVD recording mode that masters the entire disc in one pass, rather than a track at a time as in Track At Once or TAO. DAO mode, unlike TAO mode, allows any amount of audio data (or no data at all) to be written in the "pre-gaps" between tracks. Interference colors. ... DVD is an optical disc storage media format that can be used for data storage, including movies with high video and sound quality. ... A CD-R (Compact Disc-Recordable) is a thin (1. ... A master recording is an original recording, from which copies may be made. ...

One use of this technique, for example, is to burn track introductions to be played before each track starts. A CD player will generally display a negative time offset counting up to the next track when such pre-gap introductions play. Pre-gap audio before the first track of the CD makes it possible to burn an unnumbered, "hidden" audio track. This track can only be accessed by "rewinding" from the start of the first track, backwards into the pre-gap audio. The Pregap on a Red Book audio CD is the portion of the audio track that precedes index number 01 for a given song in the table of contents (TOC). ... The Pregap on a Red Book audio CD is the portion of the audio track that precedes index number 01 for a given song in the table of contents (TOC). ...

DAO recording is also the only way to write data to the unused R-W sub-channels. This allows for extended graphic and text features on an audio CD such as CD+G and CD-Text. The title given to this article is incorrect due to technical limitations. ... Interference colors. ...

See also

• Red Book (audio CD standard)