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Quick Random Access
Like CDs, MDs offer
instantaneous random access to
the beginning of any music track.
Premastered MDs are recorded
with location addresses
corresponding to each music
selection.
Recordable MDs are
manufactured with a “User
TOC Area” to contain the order of
the music. The TOC (Table of
Contents) system is similar to the
“directory management system”
of floppy disks. In other words,
starting and ending addresses for
all music tracks recorded on the
disc are stored in this area. This
lets you randomly access the
beginning of any track as soon as
you enter the track number
(AMS), as well as label the
location with a track name as you
would a file on a diskette.
BA
B — Music Data
A — User TOC Area
Contains the order and start/end points of the music.