My English is very bad, but I am going to make me understand. MP3-Fraunhofer is a coder created by a company for Microsoft for its format RIFF, it is a MP3 to which its extension is changed. MP3-LAME has an algorithm dedicated to "Joint Stereo" of a MP3. MP3-LAME is a little better, but you must consider the speed with which codifies a file. When codifying a file to "MP3-LAME 48kbps" we have a file with low quality. When codifying a file to "MP3-Fraunhofer 48kbps" we have a file of low quality but with emphasis in the high sounds. I suppose that they chose to the format that is approached to the quality of CD.
A very important aspect is the time that take in codifying file MP3. Fraunhofer takes less time than MP3-LAME in codifying a file,
And "Sonicstage2,0(ATRAC)" coder takes less time than the others, in equal conditions of bitreat. It is not that ATRAC is a wonder, but to codify thousands of archives would be a nightmare. :wacky: