How do I identify sound bytes hidden inside an image file (Steganography)?

This image that you see below, has an audio/sound hidden inside it as part of Steganography. So somewhere in all those hex bytes are some hex bytes that belong to a sound byte. How do I identify, extract, and play the sound bytes?

Actually, I'm creating a program that would do this but first I need to do this manually to make sure I understand the details of the process.

So far, I have opened the image in a hex editor and looked at the bytes. However, for the life of me I cannot identify the sound. I have spent days over this. I even tried opening the file (as 'Raw Data') in Audacity and playing it. Nothing but 'noise'. Tried to create a histogram/frequency analysis but nothing.

Any help would be appreciated.