Adobe Premiere Swap Channels Effect
The Swap Channels effect is only available for stereo audio clips. It is a very simple effect, moving the left channel audio to the right channel and vice versa.
This effect can be found in the effects window, under Audio Effects > Stereo >Swap Channels. To apply this effect, select the appropriate clip in the timeline and drag the effect onto the clip (or drag the effect into the Effect Controls window).