audio – Modify sound of a website in Chrome (Specifically Whatsapp Web running in Chrome –app box)

I have several Whatsapp Webs running in Chrome apps on Windows 10 (i.e. argument "C:Program Files (x86)GoogleChromeApplicationchrome.exe" --app= (I can pick which with profile-directory argument)

However, they all play the same new sound when a message is received. How can I swap the new message sound of an individual instance for my own custom sound?