Summary: dither is noise that is added to preserve information when reducing bit depth. this video 'audio dither explained' by nigel redmon contains a simple and enlightening visualization of how that is possible if you aren't familiar. <a href="https://www.youtube.com/watch?v=zWpWIQw7HWU&t=36s" rel="noopener">https://www.youtube.com/watch?v=zWpWIQw7HWU&t=36s</a>
