●Do not expose the CD to direct sun-
light.
● CDs that are in poor condition or are
dirty, scratched or covered with finger-
prints may not work properly.
● The following CDs may not work prop-
erly:
● Copy control compact discs (CCCD)
● Recordable compact discs (CD-R)
● Rewritable compact discs (CD-RW)
● Do not use the following CDs as they
may cause the CD player to malfunc-
tion:
● 8 cm (3.1 in) discs with an adapter
● CDs that are not round
● CDs with a paper label
● CDs that are warped, scratched, or
have abnormal edgesCompact disc with MP3
Terms
● MP3 — MP3 is short for Moving Pictures
Experts Group Audio Layer 3. MP3 is the
most well-known compressed digital audio
file format. This format allows for near “CD
quality” sound, but at a fraction of the size of
normal audio files. MP3 conversion of an
audio track from CD-ROM can reduce the
file size by approximately a 10:1 ratio with
virtually no perceptible loss in quality. MP3
compression removes the redundant and
irrelevant parts of a sound signal that the
human ear does not hear.
● Bit rate — Bit rate denotes the number of
bits per second used by a digital music file.
The size and quality of a compressed digital
audio file are determined by the bit rate used
when encoding the file.
● Sampling frequency — Sampling frequency
is the rate at which the samples of a signal
are converted from analog to digital (A/D
conversion) per second. ●
ID3 tag — The ID3 tag is the part of the
encoded MP3 file that contains information
about the digital music file such as song title,
artist, album title, encoding bit rate, track
time duration, etc. ID3 tag information is
displayed on the Album/Artist/Track title line
on the display.
4-26Heater, air conditioner, audio and phone systems
