Nissan LEAF 2023 Owners Manual
8.9.1. Compact Disc (CD)/USB memory with MP3 or WMA
Explanation of terms
MP3 — MP3 is short for Moving Pictures Experts Group Audio Layer 3. MP3 is the most well known compressed digital audio file format. This format allows for near “CD quality” sound, but at a fraction of the size of normal audio files. MP3 conversion of an audio track from CD can reduce the file size by approximately 10:1 ratio (Sampling: 44.1 kHz, Bit rate: 128 kbps) with virtually no perceptible loss in quality. MP3 compression removes the redundant and irrelevant parts of a sound signal that the human ear doesn’t hear.
WMA — Windows Media Audio (WMA) is a compressed audio format created by Microsoft as an alternative to MP3. The WMA codec offers greater file compression than the MP3 codec, enabling storage of more digital audio tracks in the same amount of space when compared to MP3s at the same level of quality.
Bit rate — Bit rate denotes the number of bits per second used by a digital music files. The size and quality of a compressed digital audio file is determined by the bit rate used when encoding the file.
Sampling frequency — The rate at which the samples of a signal are converted from analog to digital (A/D conversion) per second.
Multisession — Multisession is one of the methods for writing data to media. Writing data once to the media is called a single session, and writing more than once is called a multisession.
ID3/WMA Tag — The ID3/WMA tag is the part of the encoded MP3 or WMA file that contains information about the digital music file such as song title, artist, album title, encoding bit rate, track time duration, etc. ID3 tag information is displayed on the Album/Artist/Song title line on the display.
* Windows® and Windows Media® are registered trademarks and trademarks in the United States of America and other countries of Microsoft Corporation of the USA.
Playback order
- (A) Root folder
- (B) Folder
- (C) MP3/WMA
The music playback order of the CD with MP3 or WMA is as illustrated.
The names of folders not containing MP3 or WMA files are not shown in the display.
If there is a file in the top level of the disc, Root Folder is displayed.
The playback order is the order in which the files were written by the writing software. Therefore, the files might not play in the desired order.
Specification chart
Supported media | CD, CD-R, CD-RW, USB 2.0 | ||
Supported file systems | ISO9660 LEVEL1, ISO9660 LEVEL2, Romeo, Joliet ISO9660 Level 3 (packet writing) is not supported. Files saved using the Live File System component (on a Windows Vista – based computer) are not supported. | ||
Supported versions*1 | MP3 | WMA*3 | MPEG1, MPEG2, MPEG2.5 |
Sampling frequency | 8 kHz - 48 kHz | ||
Bit rate | 8 kbps - 320 kbps, VBR*4 | ||
WMA*3 | WMA*3 | WMA7, WMA8, WMA9 | |
Sampling frequency | 32 kHz - 48 kHz | ||
Bit rate | 32 kbps - 192 kbps, VBR*4 | ||
Tag information (Song title and Artist name) | ID3 tag VER1.0, VER1.1, VER2.2, VER2.3, VER2.4 (MP3 only) | ||
WMA tag (WMA only) | |||
Folder levels | Folder levels: 8, Folders: 255 (including root folder), Files: 512 (Max. 255 files for one folder) | ||
Displayable character codes*2 | 01: ASCII, 02: ISO-8859-1, 03: UNICODE (UTF-16 BOM Big Endian), 04: UNICODE (UTF-16 Non-BOM Big Endian), 05: UNICODE (UTF-8), 06: UNICODE (Non- UTF-16 BOM Little Endian) | ||
- *1 Files created with a combination of 48 kHz sampling frequency and 64 kbps bit rate cannot be played.
- *2 Available codes depend on what kind of media, versions and information are going to be displayed.
- *3 Protected WMA files (DRM) cannot be played.
- *4 When VBR files are played, the playback time may not be displayed correctly. WMA7 and WMA8 are not applied to VBR.
Troubleshooting guide
Symptom | Cause and Countermeasure |
Cannot play | Check if the disc was inserted correctly. |
Check if the disc is scratched or dirty. | |
Check if there is condensation inside the player, and if there is, wait until the condensation is gone (about 1 hour) before using the player. | |
If there is a temperature increase error, the CD player will play correctly after it returns to the normal temperature. | |
If there is a mixture of music CD files (CD-DA data), MP3/WMA files on a CD, only the music CD files (CD-DA data) will be played. | |
Files with extensions other than “.MP3”, “.WMA”, “.mp3”, or “.wma” cannot be played. In addition, the character codes and number of characters for folder names and file names should be in compliance with the specifications. | |
Check if the disc or the file is generated in an irregular format. This may occur depending on the variation or the setting of MP3/WMA writing applications or other text editing applications. | |
Check if the finalisation process, such as session close and disc close, is done for the disc. | |
Check if the disc is protected by copyright. | |
Poor sound quality | Check if the disc is scratched or dirty. |
It takes a relatively long time before the music starts playing. | If there are many folder or file levels on the MP3/WMA disc, or if it is a multisession disc, some time may be required before the music starts playing. |
Music cuts off or skips | The writing software and hardware combination might not match, or the writing speed, writing depth, writing width, etc., might not match the specifications. Try using the slowest writing speed. |
Skipping with high bit rate files | Skipping may occur with large quantities of data, such as for high bit rate data. |
Move immediately to the next song when playing. | When a non-MP3/WMA file has been given an extension of “.MP3”, “.WMA”, “.mp3”, “.wma”, or when play is prohibited by copyright protection, there will be approximately 5 seconds of no sound and then the player will skip to the next song. |
The songs do not play back in the desired order. | The playback order is the order in which the files were written by the writing software, so the files might not play in the desired order. |