13
Playing Compact Discs
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About MP3 CDs
MP3 is a music compression technology that reduces a song’s file size without noticeable
effect in the quality of the sound. The MP3 format makes it possible for you to store many
more songs on a single CD than found on a conventional audio CD. In fact, an MP3 CD can
contain as much music as 10 standard audio CDs on just one disc, which then can be orga-
nized into folders on a computer before being stored on the disc.
The order in which MP3 songs are played is determined by how the MP3 files are organized
and stored on the CD. For example, Figure 12 shows the play order of songs that are orga-
nized into four folders.
Figure 12
Example of MP3 CD file
organization
Folder 00 Track 1!
Track 2!
!
Track 8
Folder 01 Track 1!
Track 2!
!
Track 8
Folder 02 Track 1!
Track 2!
!
Track 8
Folder 03 Track 1!
Track 2!
!
Track 8
Root level (Folder 00)
Folder 01
Folder 03
Folders:
Folder 02
Play order:
The audio quality of MP3 CDs is dependent on factors such as the encoded bit rate, the sam-
pling rate, and the type of encoder used. The Acoustic Wave® music system II supports MP3
CDs encoded at bit rates of 64kbps or higher, and sampling rates of 32kHz or higher. It is rec-
ommended that a bit rate of at least 128kbps and a sampling rate of 44.1kHz or higher be
used.
Note: Playback quality of recorded CD-Rs and CD-RWs is dependent on the CD recording
process and software used to record the disc. An improperly recorded audio CD may cause the
system to exhibit unexpected behavior.