2015 Nissan Versa Owner's Manual - Page 181

Compact disc with MP3 or WMA 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-ROM can reduce the file size by approximately a 10:1 ratio 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 file. The size and quality of a compressed digital audio file is determined by the bit rate used when encoding the file. ● Sampling frequency - Sampling frequency is 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, encoding bit rate, track time duration, etc. ID3 tag information is displayed on the 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. WHA1078 Playback order chart Playback order Music playback order of a CD with MP3 or WMA files is as illustrated. ● The names of folders not containing MP3 or WMA files are not shown in the display. 4-34 Monitor, climate, audio, phone and voice recognition systems