73
2. AUDIO SYSTEM
2
AUDIO SYSTEM
WMA/AAC files can contain a WMA/AAC
tag that is used in the same way as an ID3
tag. WMA/AAC tags carry information
such as track title and artist name.
This system can play back AAC files
encoded by iTunes.
The sound quality of MP3/WMA files gen-
erally improves with higher bit rates. In
order to achieve a reasonable level of
sound quality, the files with a bit rate of at
least 128 kbps are recommended.
M3u playlists are not compatible with the
audio player.
MP3i (MP3 interactive) and MP3PRO for-
mats are not compatible with the audio
player.
The player is compatible with VBR (Vari-
able Bit Rate).
When playing back files recorded as VBR
(Variable Bit Rate) files, the play time will
not be correctly displayed if the fast for-
ward or rewind operations are used.
It is not possible to check folders that do
not include MP3/WMA/AAC files.
The order changes depending on the per-
sonal computer and MP3/WMA/AAC
encoding software you use.AAC is short for Advanced Audio Coding
and refers to an audio compression tech-
nology standard used with MPEG2 and
MPEG4.
This is a method of embedding track-
related information in an MP3 file. This
embedded information can include the
track number, track title, the artist’s name,
the album title, the music genre, the year
of production, comments, cover art and
other data. The contents can be freely
edited using software with ID3 tag editing
functions. Although the tags are restricted
to a number of characters, the information
can be viewed when the track is played
back.
Playlists created using “WINAMP” soft-
ware have a playlist file extension (.m3u).
MP3 is an audio compression standard
determined by a working group (MPEG) of
the ISO (International Standard Organiza-
tion). MP3 compresses audio data to
about 1/10 the size of that on conventional
discs.TERMS
AAC
ID3 TAG
m3u
MP3
74
2. AUDIO SYSTEM
WMA (Windows Media Audio) is an audio
compression format developed by Micro-
soft
®. It compresses files into a size
smaller than that of MP3 files. The decod-
ing formats for WMA files are Ver. 7, 8 and
9.
This product is protected by certain intel-
lectual property rights of Microsoft Corpo-
ration and third parties. Use or distribution
of such technology outside of this product
is prohibited without a license from Micro-
soft or an authorized Microsoft subsidiary
and third parties.
WMA files can contain a WMA tag that is
used in the same way as an ID3 tag. WMA
tags carry information such as track title
and artist name.
WMA
WMA TAG
