Can you check from the javascript console log of the browser if FMOD is giving any errors? If you don't know how to do that you can look here for instructions.
Viewing post in Changing the music?
Thank you so much for your message (and your game!). I managed to get it working. No errors at the console and the game was running fine except for no audio, so I guessed there must be a problem in my Fmod bank. I repeated the process of replacing the assets and a little change seemed to solve the issue: importing them directly in Fmod (instead of replacing the files in the folder at Windows file explorer).