Song Director is a music player and music collection software.
Song Director organizes MP3 and most music formats for digital music. Below is a good paper explaining MP3 and AAC music formats which Song Director can help organize for your music collection. You can download Song director for free here
MP3 AND AAC EXPLAINED
by KARLHEINZ BRANDENBURG1
MPEG AND INTERNET AUDIO
The proliferation of MPEG coded audio material on the
Internet has shown an exponential growth ”MP3” has
been featured in numerous articles in newspapers and periodicals
and on TV, mostly on the business pages because
of the potential impact on the recording industry.
While everybody is using MP3, not many (including
some of the software authors writing MP3 encoders,
decoders or associated tools) know the history and the details
of MPEG audio coding. This paper explains the basic
technology and some of the special features of MPEG-
1/2 Layer-3 (aka MP3). It also sheds some light on the
factors determining the quality of compressed audio and
what can be done wrong in MPEG encoding and decoding.
Why MPEG-1 Layer-3 ?