Browser fingerprinting allows you to identify uniquely a browser and thus the user. This usually means that VPN and incognito mode will not help you to "change you identity".
audiocontext fingerprinting is less identifying than you think. It pretty much boils down to "what's your browser complied with and what FPU implementation you're running"
One example I know well is AudioContext fingerprinting with a demo available here: https://audiofingerprint.openwpm.com/
There are also worse fingerprinting methods that work cross-browsers.