QUOTE (ZinCh @ Nov 4 2007, 22:32)

How I can remove Fraunhofer IIS MP3 Surround data from MP3? Of course losely

its not lossless to remove data from an mp3. However, you can remove the Surround / SX extension without destroying or affecting the stereo part.
----> use mp3packer without switches... ("mp3packer file.mp3")