These tips explain some of the special features of Enhanced Music CD format.

CD Extra Hierarchies

Toast can make an Enhanced Music CD disc from a manually constructed directory hierarchy.

Toast verifies several parts of the directory structure before starting to write it to CD. In particular, Toast checks the following criteria:

Directories

A CDPLUS and a PICTURES directory must be present in the CD EXTRA directory in the root directory of the Macintosh volume.

INFO.CDP

The file INFO.CDP must be present in the CDPLUS directory. It has to conform to the Blue Book specifications and contain space for pointers to each of the SUB_INFO.lc files.

SUB_INFO.lc

The SUB_INFO.lc files must be valid, conforming to the Blue Book specifications and containing space for pointers to each of the TRACKnn.MID, LYRICSnn.lc, and picture files.

AUTORUN.INF

If there is no AUTORUN.INF file in the CD EXTRA directory of the HFS volume, Toast creates a simple file with just the line "[autorun]" in it. You can edit this file, but remember to save it in CR/LF format.

Picture Files

Toast only accepts picture files with file extensions of the form nnx (for example, JACKET01.00J or VANESSA.01J) where nnx is a track number (or 00 for the whole album), and x is the format type which could be any of J, N, T, S, P, A, or L.

JPEG files must be present; if they are missing, MPEG files will be substituted using ToastÕs built-in set of MPEG replacement pictures (showing the CD EXTRA logo).

If MPEG files are present, they must be fully sectorized (2352 bytes/ sector), not scrambled. The header and sync fields are patched during recording, but the subheader has to be correct.