The Augsburg Confession is the first and most fundamental Confession of the Lutheran Church. It was composed for a public reading at the Diet of Augsburg on June 25, 1530. For some years now it has been available on the internet to be read and printed. Now, it is available for listening.
If you are interested in hearing, first hand, a simple presentation of what Lutherans believe go to this link to download the mp3 files of the Confession. If you want to get right to the heart of the reading, skip the Preface and download the 21 Chief Articles.