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Appendix
32
Session-at-Once (SAO)
As a writing method that combines the advantages of the above-mentioned “Disc-
at-Once” and “Track-at-Once,” you can combine multiple tracks into one session
and write them, and then add additional data.
For example, this is the writing method used to create a CD EXTRA format CD.
The music tracks will be recorded in the first session, and the data will be
recorded in the second session.
Lead-in Lead-outLead-out
/Lead-in
DataAudio Audio Audio
0 650MB
Track 1 Track 2 Track 3 Track 4
Session 1 Session 2