This is really NOT the easiest starter-project if you want to build this from scratch. Check AVRFreaks (http://www.avrfreaks.net/) for inspiration.
You can buy the mentioned ICs on ebay.com (international shipping) for less than 20$ or try to get some free samples from the manufacturers. Check their homepages - they all have some sort of sample-request form. http://cgi.ebay.de/ST-MPEG-2-5-LAYER-III-AUDIO-DECODER-IC-STA013-MP3-IC_W0QQ itemZ350143982337QQcmdZViewItemQQptZBI_Electronic_Components?hash=item350143 982337&_trksid=p3286.m63.l1177 http://cgi.ebay.de/MPEG-2-5-LAYER-III-AUDIO-DECODER-IC-STA013-NEW_W0QQitemZ2 60268299047QQcmdZViewItemQQptZBI_Electronic_Components?hash=item260268299047 <http://cgi.ebay.de/MPEG-2-5-LAYER-III-AUDIO-DECODER-IC-STA013-NEW_W0QQitemZ 260268299047QQcmdZViewItemQQptZBI_Electronic_Components?hash=item26026829904 7&_trksid=p3286.m63.l1177> &_trksid=p3286.m63.l1177 http://cgi.ebay.de/MP3-WMA-AUDIO-CODEC-IC-VS1003B-VS1003_W0QQitemZ1103077975 03QQcmdZViewItemQQptZBI_Electronic_Components?hash=item110307797503&_trksid= p3286.m63.l1177 For quick prototyping you can glue and solder the IC to a DIL-Socket and use it in a breadboard. Just use the datasheet for the decoder IC to get rolling - they usually have example setups. At least use a LCD to get some debugging output but I would suggest you buy a JTAG-Debugger like the AVR-Dragon for such a project befor you go mad ;) If you really want to do this all in software you should check the ARM7 32bit Cores - for example Atmel AT91SAM7S256 or LPC2000 from NXP. They can handle the load as a single chip solution but you will have to take the coding time into account. For a non-commerical (no-volume) product I would always go for the decoder IC solution to save time. Regards, Tillmann Krauss
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