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18 DB185MP
CD/MP3/WMA Operations
MP3/WMA
What is MP3?
MP3 is an audio compression method and
classified into audio layer 3 of MPEG standards.
This audio compression method has penetrated
into PC users and become a standard format.
This MP3 features the original audio data
compression to about 10 percent of its initial
size with a high sound quality. This means that
about 10 music CDs can be recorded on a CD-R
disc or CD-RW disc to allow a long listening time
without having to change CDs.
What is WMA?
WMA is the abbreviation of Windows Media
Audio, an audio file format developed by
Microsoft Corporation.
Notes:
• If you play a file with DRM (Digital Rights
Management) for WMA remaining ON, no audio
is output (The WMA indicator blinks).
• Windows Media™, and the Windows ® logo are
trademarks, or registered trademarks of
Microsoft Corporation in the United States and/or
other countries.
● To disable DRM (Digital Rights
Management)
1. When using Windows Media Player 9/10/11,
click on TOOL ➜ OPTIONS ➜ MUSIC
RECORD tab, then under Recording
settings, unclick the Check box for RECORD
PROTECTED MUSIC. Then, reconstruct
files.
Personally constructed WMA files are used
at your own responsibility.
Precautions when creating MP3/
WMA file
● Usable sampling rates and bit rates
1. MP3: Sampling rate 8 kHz-48 kHz,
Bit rate: 8 kbps-320 kbps / VBR
2. WMA: Bit rate 48 kbps-192 kbps
● File extensions
1. Always add a file extension “.MP3” or
“.WMA” to MP3 or WMA file by using single
byte letters. If you add a file extension other
than specified or forget to add the file
extension, the file cannot be played.
2. Files without MP3/WMA data will not play.
The indication “– –:– –” appears in the play
time display if you attempt to play files
without MP3/WMA data.
● Logical format (File system)
1. When writing MP3/WMA file on a CD-R disc
or CD-RW disc, please select “ISO9660 level
1, 2 or JOLIET or Romeo” as the writing
software format. Normal play may not be
possible if the disc is recorded on another
format.
2. The folder name and file name can be
displayed as the title during MP3/WMA play
but the title must be within 64 single byte
alphabetical letters and numerals (including
an extension).
3. Do not affix a name to a file inside a folder
having the same name.
● Number of files or folders
1. Up to 256 files can be recognized per folder.
Up to 578 files can be played.
2. Tracks are played in the order that they were
recorded onto a disc. (Tracks might not
always be played in the order displayed on
the PC.)
3. Some noise may occur depending on the
type of encoder software used while
recording.