Google will find a lot of programs specialized for finding duplicates on different ways.
Feel free to read and try, some apps can do analyse audio content means acoustic analysing / fingerprinting.
For fingerprinting, you can use my free mediapurge >Featurs< >Download< >Short Video how to do<
It's an very easy to use wizard that gives you control about what do you want to do. At last step you can watch search result and choose what to do.
Note: If you want to use mediapurge for formats except mp3 wma wav and so on, you need to download external decoder at configuration menue before you start.
Feel free if you have any questions.