Compact Disc/USB memory with MP3
or WMA (where fitted)
Terms:
•MP3 — MP3 is short for Moving Pictures Ex-
perts 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 can re-
duce the file size by approximately 10:1 ratio
(Sampling: 44.1 kHz, Bit rate: 128 kbps) with
virtually no perceptible loss in quality. MP3 com-
pression removes the redundant and irrelevant
parts of a sound signal that the human ear
doesn’t hear.
•WMA — Windows Media Audio (WMA)* is a
compressed audio format created by Microsoft
as an alternative to MP3. The WMA codec offers
greater file compression than the MP3 codec,
enabling storage of more digital audio tracks in
the same amount of space when compared to
MP3s at the same level of quality.
•Bit rate — Bit rate denotes the number of bits
per second used by a digital music files. The size
and quality of a compressed digital audio file is
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 con-
verted from analog to digital (A/D conversion)
per second.
•Multisession — Multisession is one of the meth-
ods for writing data to media. Writing data once
to the media is called a single session, and writ-
ing more than once is called a multisession.
•ID3/WMA Tag — The ID3/WMA tag is the part
of the encoded MP3 or WMA 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.
* Windows® and Windows Media® are registered
trademarks and/or trademarks of Microsoft Cor-
poration in the United States of America and/or
other countries.
A.Root folder
B.Folder
C.Audio file
Playback order:
Music playback order of the CD with MP3 or WMA
is as illustrated above.
NAA984
Heater and air conditioner, and audio system4-13
