Sonos 4 central feature is a free state of the art software nine and eighteen band compressor limiter for radio broadcasters.When used with a 192kHz sound card stereo multiplex generation with RDS is enabled. There is a client for Icecast or Shoutcast streaming using MP3 or AACPlus encoding. Also a audio over IP feature thatr supports bidirectional links for STL use or OB use
What's new in this version:
Version 4.5 improves the loudness at the expense of occasional noticible clipping in the FTC.