Hi All,
 
I need to build a portable audio device that will play music to the user wearing it. However, I want to use a PIC to control the operation of the device e.g. selecting tracks. I cannot use off-the-shelf commercially available MP3 players, because the operations of these player are all controlled by the user through some mechanical switches. 
 
Is there any portable MP3 player that has interface to MCU, e.g. RS232? If not, could anyone suggest me some ways to achieve the purpose, whatever device or method is not important, I only need to provide a solution that a user can listen to music when he/she is walking and the track is selectable by a PIC (i.e. programmable).
 
Thanks in advance!
 
John
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