Enhanced CD Guide

One of a few Enhanced CD logos

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Attribution: Philips, Public domain, via Wikimedia Commons

Definition: Also called CD-Extra and CD-Plus. Enhanced CD is a very broad term used by the music industry for any disc that carries both audio tracks and data (Often for IBM PC though PC/Mac hybrids are also known). For redump purposes meanwhile, the term is used exclusively for Multisession CDs (Blue book) and Mixed mode (Yellow book) CDs where the primary content is the Audio tracks.

• If the data tracks are the primary content of the disc. Then add disc to the DAT where said Data tracks belong to instead.

• CD-I Ready discs while also often called Enhanced CDs are not considered such by Redump and should go under the CD-I DAT instead. Note to that there is at least one known disc mastered like a CD-I Ready one but with PC content. And any such examples are considered pure Audio CDs and should go under that DAT.

Please note! (03-26-23): Currently, Universal Hash is not implemented well for multisession / enhanced CDs. If Universal Hash exists in a submission or entry, please remove it until this feature is fully implemented.

Enhanced CDs may have languages added

Multisession Enhanced CDs have a gap of 11400 sectors between sessions

How to calculate multisession range (MPF should do this automatically now):

• Open disc.txt in logs and go to TOC
• Session 1 range is LBA 0 to (last sector in session 1 minus 11400)
• Session 2 range is (first sector in session 2 to last sector of disc)

Example:

Audio Track  1, LBA        0 -    14887, Length    14888
Audio Track  2, LBA    14888 -    15484, Length      597
Audio Track  3, LBA    15485 -   226234, Length   210750
Audio Track  4, LBA   226235 -   226831, Length      597
Audio Track  5, LBA   226832 -   227278, Length      447
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Session 1: 0-3487 -> (14887-11400)
Session 2: 14888-227278