Mp3 Audio; What Is Mp3; Creating Mp3 Files; Saving Mp3 Files On A Disc - Subaru 2007 B9 Tribeca Owner's Manual

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
MP3 encoding and writing software
is not supplied with the audio system.
CD writing software is not supplied
with the audio system.

Creating MP3 files

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.
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.
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.
A fixed bit rate of 128 kbps or higher is
recommended.

Saving MP3 files on a disc

Do not save any non-MP3 file on a disc.
Also, do not save any unnecessary folders
on a disc.
If many folders and/or non-MP3 files are
saved on a disc, a delay will be caused be-
fore playback begins.
If a disc contains both Compact Disc-
Digital Audio (CD-DA) files and MP3 files,
the system will play only the CD-DA files.
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'.
Do not add the extension '.MP3' to the
name of any non-MP3 file. Doing so could
lead to speaker damage.
The system does not support multi-ses-
sion recording, so disc-at-once recording
is recommended.
The system does not support packet
writing software.
The system does not have a playlist
function.
The system may not be able to display
and play certain MP3 files depending on
the writing software and CD recorder.
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:
ISO 9660 Level 1/Level 2
Apple Extension to ISO 9660
Joliet
Romeo
NOTE
The audio system does not support the
following file systems:
Apple HFS
UDF 1.50
Mix CD (CD Extra)

Compression format

MPEG 1 audio layer 3 (MP3)
Bit rate: 32 kbps – 320 kbps
Sampling frequency: 32, 44.1, 48 kHz
MPEG 2 audio layer 3 (MP3)
Bit rate: 8 kbps – 160 kbps
Sampling frequency: 16, 22.05, 24 kHz
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