This tool allows you to create a 3D audio version of any song directly in your browser. 3D versions of songs are popular on YouTube and with this tool you can create that 3D effect without having to download any annoying software.
This tool will add a very small delay to one channel which creates a small but noticeable effect. It creates the illusion that the song is playing live in front of you. This effect is only effective if you're listening with headphones.
Here is a before and after example of a short audio file that has been processed using this tool.