StereoMonoizer is a custom-built algorithm that analyzes audio files and determines their stereo content. Most DAWs export audio as stereo files, regardless if the embedded audio is mono or stereo. The main section of the user interface is a drag-and-drop area where you can drop files and folders. All audio files in .wav or .aiff format will be recognized. Everything else will be ignored. Files can also be added and removed using the + and - buttons below the drop area, or they can be dragged onto the application icon in the dock.