Hi,
As always it is best to start ( before posting ) with a search in the EDABoard.
I came up with 76 matches for the word MMC. Here is the link for the search results:
Here is the link that you where looking for: Its in german, and i dont read German, but im sure you can figure it out like i did... ( Or use google translator )
**broken link removed**
Also, you can search google with this words:mp3 mmc microchip you will find lots of interasting links.
If you found my answer useful, click on the button that says Helped me. ( NO points will be taken from you! )
Good luck.