I thought about doing such a design some.....10...15 years ago. It was one of those...wow..great idea...no time to fully invstigate it.... "Alan B. Pearce" wrote: >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). Oh, you mean you are making one of those devices that give a context related commentary when walking around a historic site? -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist --------------------------------- Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist