Whats CD-is disc structure?
Like with all official CD-standards, a CD-i disc is devided into tracks. A CD-i disc contains at least one CD-i track, and my optionally contain additional CD-Audio tracks that may also be played on a standard CD-Audio player. The CD-i track must be the first track on the disc, with the optional CD-Audio tracks hereafter. An exception to this rule is defined in the ‘CD-i Ready’ format, which is covered in more detail in the Disc types section. The first 166 sectors of the CD-i track are message sectors, followed by the Disc Label. Hereafter come an additional 2250 message sectors. Message sectors contain a spoken message in CD-Audio format, which informs users who put the disc in a regular CD-Audio player about the possible damage to equipment or speakers when the disc is not taken out immediately. Usually, a modern CD-Audio player will recognize the CD-i track as a data track and will not play it, so you won’t hear the message. It’s only included for compatibility with older CD-Audio
