The term "MP3" refers to compressed digital audio data. The MP3 format is a widely used standard for compressing digital audio data. Compared to an audio CD of virtually the same sound quality, MP3 files only occupy one-tenth of the memory space. "MP3" stands for MPEG 1 Audio Layer 3. MPEG is a process for compressing digital video and audio data and is developed by the "Motion Picture Experts Group".
To play MP3 data, an MP3-compatible playback system is required, such as the RNS 300 audio system from Volkswagen