The line of thinking you've displayed here is so obviously the inevitable trajectory of the internet; it's baffling that states are still clinging to denial.

> Now, what if I get the highest fidelity speakers and the highest fidelity microphone I can and play that song in my home. Then I use a deep learned denoiser to clean the signal and isolate the song’s true audio. Is this theft?

If the answer to this becomes "yes" for some motion down this spectrum, then it seems to me that it's tantamount to prohibiting general-purpose computing.

If you can evaluate any math of your fancy using hardware that you own, then indeed you can run this tooling, and indeed your thoughts can be repaired into something closely resembling the source material.