The Flipper flips signal polarity (misnomered often as “phase”). That’s it.
Why should you care, when so many plug-ins already include a polarity switch in them? Well, because so many DAWs do not include a polarity switch right on their mixers. This means that, instead of being able to try different polarities with ONE click of the mouse, you must open some random plug-in, hunt for the polarity switch, and then hit it.
The idea of the Flipper is to effectively add a polarity switch to any DAW mixer. If the Flipper is on, it’s flipping polarity. If it’s in Bypass, it’s not.
Because of this simplicity, you can use plug-in bypass controls in your DAW to flip polarity right from the mixer view, without having to open up the Flipper’s plug-in window. In Pro Tools, for example, if you Command-click (Mac) or Control-click (Win) on a plug-in, it bypasses that plug-in.
Note: The Flipper file is actually named “0.vst” (zero), so it will show up within your DAW as “0”. The idea was to make it look like a polarity switch, i.e. “Ø”, but since that is a special character that DAWs didn’t like to see in plug-in names, we went with “0”.
Flipper uses the Pluggo standard, and requires installation of the free Pluggo Jr or Pluggo Runtime package in order to function.