Subaru 2007 Tribeca - Manual (Page 202)

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MP3 audio
„ What is MP3?
MP3 (the name is an abbreviation of
‘MPEG Audio Layer 3’) is a compression
format for digital audio. It was developed
by the Motion Picture Experts Group. It
permits audio data to be shrunk by a factor
of approximately 10 with no loss of sound
quality, meaning that the audio on 10 con-
ventional CDs can be fitted onto a single
CD-R or CD-RW (assuming a bit rate of
128 kbps and a sampling frequency of
44.1 kHz).
NOTE
y MP3 encoding and writing software
is not supplied with the audio system.
y
CD writing software is not supplied
with the audio system.
„ Creating MP3 files
y To create a high-quality MP3 file, it is
advisable to have a high bit rate (128 kbps
or higher) and a high sampling frequency.
y
If a file is created with a variable bit rate
(VBR), the elapsed time during playback
may not be displayed correctly and the
sound may skip.
y
The sound quality during playback de-
pends upon the encoder and bit rate. De-
tailed information can be found in the us-
er’s manuals for encoder software and
writing software.
y
A fixed bit rate of 128 kbps or higher is
recommended.
„ Saving MP3 files on a disc
y Do not save any non-MP3 file on a disc.
Also, do not save any unnecessary folders
on a disc.
y
If many folders and/or non-MP3 files are
saved on a disc, a delay will be caused be-
fore playback begins.
y
If a disc contains both Compact Disc-
Digital Audio (CD-DA) files and MP3 files,
the system will play only the CD-DA files.
y
Add the extension ‘.MP3’ to the name of
every MP3 file. The system will not play
any file that has either no extension or an
extension other than ‘.MP3’.
y
Do not add the extension ‘.MP3’ to the
name of any non-MP3 file. Doing so could
lead to speaker damage.
y
The system does not support multi-ses-
sion recording, so disc-at-once recording
is recommended.
y
The system does not support packet
writing software.
y
The system does not have a playlist
function.
y
The system may not be able to display
and play certain MP3 files depending on
the writing software and CD recorder.
y
Recording must be performed using a
file system supported by the audio sys-
tem. Otherwise, the audio system may not
play the MP3 files and may not display
folder titles and file titles.
„ Supported file systems
The audio system supports the following
file systems:
y
ISO 9660 Level 1/Level 2
y Apple Extension to ISO 9660
y Joliet
y Romeo
NOTE
The audio system does not support the
following file systems:
y
Apple HFS
y UDF 1.50
y Mix CD (CD Extra)
„ Compression format
y MPEG 1 audio layer 3 (MP3)
Bit rate: 32 kbps – 320 kbps
Sampling frequency: 32, 44.1, 48 kHz
y
MPEG 2 audio layer 3 (MP3)
Bit rate: 8 kbps – 160 kbps
Sampling frequency: 16, 22.05, 24 kHz
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