Sonos 4 - Version 4.0.0 Sonos 4 turns a PC with sound card into a multiband broadcast radio processor limiter.There are seven audio processors.The best of which is are the nine and eighteen band processors.The processors have easy to use controls with saving and loading of presets.The architecture of the processors is similar only differing in the number of bands.There is a stereo enhancer and widener.Multiband gated AGC (selectable one,two or three band).The multiband limiter is followed by a broadband limiter and distortion masked clipping for maximum loudness.When used with a suitable 192kHz sound card stereo multiplex generation with RDS.The RDS function has a feature that scrolls the Program Service Name text and can insert the current track name from file.It has an integrated client for connecting to Icecast or Shoutcast streaming servers using MP3 or AAC Plus