Did you read my comment at all before answering? Note: You answered AFTER my edit.
Let me break it down for you:
>> I would need someone to help me verify that sound works.
> You could use a microphone to record the output and plot it using Audacity.
>> but why? I don't hear so why?
> What if unknowingly you do have working audio, cranked up to 11, while browsing PornHub?