MP3播放器是一种新兴的数字音乐播放器，播放MP3、WMA等格式的文件。通过用MPEG-1 Layer 3编码技术，可以得到大约12：1压缩的有损音乐信号。尽管MP3音乐是有损的，它在压缩过程中对功率谱较弱的信号有所丢失，但它同CD原声区别不大，不影响一般音乐爱好者对音乐的欣赏。MP3大大缩小了声音文件的长度，使音乐的存储和传输更方便。-The MP3 player is a new digital music player, play MP3, WMA and other file formats. About 12:1 compression with MPEG-1 Layer 3 coding technology, can be detrimental to the music signal. Although the MP3 music is detrimental to the weak signal power spectrum has lost in the compression process, but it is not much different with the CD soundtrack, does not affect the general music lovers for music appreciation. MP3 greatly reduced the length of the sound files, and more convenient storage and transmission of music.