Version 2.2.0

• Support for Icecast stream metadata updates in scanning mode. When enabled,
  every time the scanner stops on a channel, current frequency is written into
  Icecast song title, which in turn is displayed in the player. Alternatively,
  textual labels can be configured for each frequency. It is possible
  to configure the amount of delay between the stream and metadata updates to
  synchronize them with the audio. There are some caveats however - read
  comments in rtl_airband.conf.example for details.
• Added global option localtime. When enabled, rtl_airband uses local time
  instead of UTC time for output file names. (Credit: ScanOC).
• Auto gain feature removed. RTL auto gain does not work well for narrowband
  channels. Most often it sets the gain too high which causes problems for
  auto squelch and audio bleeding between adjacent channels. Gain must be
  configured manually from now on.
• Dropped unmaintained Windows build.
• Reverted to power level calculation algorithm from version 2.0.2. The new
  algo didn't really do much to sensitivity, but introduced annoying clicks
  on squelch open/close.
• Improved DC offset estimator for AM mode. This one hardly ever clicks
  on squelch opening.
• Boosted AM audio volume.
• Reduced squelch flapping in NFM mode.