VocoPro DVX-680K, Owner'S Manual

Page: 23 / 27

23
MP3 FUNCTIONS AND OPERATIONS
The DVX-680K can play back MP3 files recorded to CD-ROM, CD-R or CD-RW discs.
Notes on MP3 discs
An MP3 file stores audio data that has been compressed using the MPEG1 encoding scheme. Although PC terminology regarding MP3s and storage is, “files” and
“folders”, in this manual we refer to them as “tracks and albums”.
Notes on playing MP3s
· An MP3 track must be recorded on a disc in the format compliant with ISO9660. Track order may differ from MP3 player to MP3 player.
· The maximum allowable number of tracks and/or albums located on a disc is 900, including the root albums (directory).
· The maximum allowable depth of a nested folder is 127, including files.
· If a disc contains both audio as well as MP3 tracks, it will not play in the DVX-580G.
· Multi-session discs are limited to a total of 20 sessions.
· MP3 playback is optimal with MP3s encoded with a sampling rate of 44.1 kHz and a fixed bit rate of 128 kbps.
· The unit may not play MP3 tracks recorded using a packet writing utility.
· The unit can only play back MP3 tracks having a file extension of “.mp3”.
· It may take 30 seconds or more before the unit can start playback of MP3’s. This time depends on the number of recorded tracks and the complexity of the album
tree.
· If you play a non-MP3 track that has the “.mp3” file extension, the unit will skip to the next valid track automatically.
· Digital recordings with this unit cannot be done while playing back MP3 discs.
Notes on display indications during playback
· Up to 8 characters are displayed for the name of an album or track.
· Characters other than uppercase letters (“A” to “Z”), numerals (“0” to “9”) and underscore (“_”) may not be displayed, or may be displayed in different characters.
· The elapsed playing time may not be displayed correctly for MP3 tracks.
· Depending on the condition of the recording equipment or the CD-R/RW disc itself, a false album or track which cannot by played on the unit may be displayed on
a TV screen.
Notes on creating MP3 discs
· When converting audio data to MP3, create MP3 files with a sampling frequency of 44.1 kHz and a fixed bit rate of 128 kbps.
· When creating MP3 discs, do not store more than 900 albums and/or tracks in a disc.
· To play tracks in the order they were recorded, ensure your encoding software is set up to auto arrange by name, or use only one album (if they are already alpha-
betized) or place a three digit number in front of each track to set an order manually.
Recommended = 001-Song.mp3, 002-Song.mp3, 003-Song.mp3…
Not Recommended = 1-Song.mp3, 5-Song.mp3, 10-Song.mp3…
MP3 Glossary
File Extension - A 3-character string added to a file name under the Windows or DOS environment is called a “file extension”. A file extension is used mainly to
identify types of files. The file extension for MP3 files is “.mp3”.
ISO 9660 - ISO stands for the “International Organization for Standardization”. ISO 9660 determines the file structure for CD-ROMs. This unit can play MP3 files
recorded in the format compliant with ISO 9660.
Nesting of folders (albums) - To organize all your data files stored in a PC, you can store related files in a folder. A folder can contain other folders as well as files.
For example, FOLDER A can contain FOLDER B (as well as files) and FOLDER B can contain FOLDER C (as well as other files).
Session - A session is one uninterrupted section of written data on a disc. A multi-session disc is a disc that has more than two sessions.
MP3 play mode
Load an MP3 disc.
The disc will automatically load and display the MP3 window. It may take up to 20 seconds for an MP3 disc to be read depending on the complexity of the file
structure.
Enabling Smart Navigation.
Smart Navigation enables you to select one of 10 available MP3 playback modes.
If Smart Navigation is disabled, MP3 discs will autoplay with no menu options when inserted. You should still be able to forward or reverse tracks like a standard
CD. To enable Smart Navigation see the PREFERENCES section.