Inverts phase of first channel.
Compile using WinAmp SDK: http://download.nullsoft.com/winamp/plugin-dev/WA5.55_SDK.exe
Or download binary (DLL) from releases.
Useful for messed up movies (often camrips) whose sound has inverted phase of one channel, therefore sounds "silly".
Can be used in video players like PotPlayer, GOM Player, ...