- Many improvements in quality in speed over ISO reference software. See history. - MPEG1,2 and 2.5 layer III encoding. - CBR (constant bitrate) and two types of variable bitrate, VBR and ABR. - Encoding engine can be compiled as a shared library (Linux/UNIX), DLL or ACM codec (Windows) - free format encoding and decoding - GPSYCHO: a GPL'd psycho acoustic and noise shaping model. - Powerfull and easy to use presets - Quality is comparable to FhG encoding engines and substantially better than most other encoders. - Fast! Encodes faster than real time on a PII 266 at highest quality mode. - MP3x: a GTK/X-Window MP3 frame analyzer for both .mp3 and unencoded audio files.
Audio Codecs 
