add custom music soundtracks for video capturing

It would be nifty if Bandicam can add custom music soundtrack (.mp3, .wav, .ogg, .wma, .aac formats) for the video capture. Though we can always run a music player before starting a video capture, it is sometimes useful to have this kind of soundtrack mixing allowed. If this idea is taken up, then user must be given option that Bandicam will either mute the original audio (and play only the custom soundtrack), or the custom soundtrack will be mixed with the original audio (useful for adding a peppy beat to an FPS game :-).

Thanks!