Yes, I did read your comment before answering. Note: I commented on points you brought up IN your 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?