In a vacuum tube, nobody can hear you scream.

[Magpie]

I do know there have been studies where the sound of vinyl records was compared with
CD sound that had had a little sputtery white noise mixed in. No one could tell them apart.

With MP3 (128 kbps), on the other hand, experienced listeners can tell the difference.

I should warn you that you may regret giving me an opportunity to talk about psychoacoustics because once I've started it is practically impossible to stop me.

Lets start with binaural beats...