Reason Polar Rack ExtensionPolar is an old school harmonizing and pitch shifter effect with a host of modern tricks up its dual sleeves. Use it for classic harmonizing, stereo widening and realtime pitch shifting, or experiment with freezing and looping for otherworldly effects. This is a Rack Extension or for Reason Features Polar is an old school harmonizing and pitch shifter effect with a host of modern tricks up its sleeves. Use it for classic harmonizing, stereo widening,