With the development of science and technology, with digital audio capabilities of the digital terminal products in daily life has been widely used. It also facilitates the function associated with the digital audio compression technology, the digital audio compression technology, MP3 technology for its excellent performance has been widely used.
The article is mainly aimed at the mp3's capacity on the market and play format limited and so on to be designed to facilitate micro-SD or MMC memory cards, the capacity expansion, and play MP3, WMA, WAV, MIDI and other files. Users only need to put MP3 and other format files into the memory card, will be able to play the music. The design of the MP3 also has a radio function, the use of multiple FM TEA5767 chip can listen to the radio frequency.This design supports heavy bass, surround sound audio. This design not only can be used as car audio, but also can be used for home playing, office occasions, or in portable equipment.
Key words:MP3 player SD card TEA5767 chip