"The sound of the music when initially played to make a recording, is not the sound that you hear when played back"
It's probably not the sound those present for the recording hear either. For all that we know, the microphone might be a much more efficient transducer than our ears. Our eyes look at a symphony orchestra, and then a speaker, and our brain quite sensibly tells us that there's no way that those small circles in a box can reproduce the sonics coming from on stage. Well, maybe the box doesn't have to; what makes us think that, even at a live performance, we're hearing the sound that's emanating from those performers? And don't talk about measurements; measurements are designed to be relevant to our hearing capacity. If we're flawed, our measurements will be likewise. I guess what I'm saying in a nutshell, is that if current music reproduction technology is twenty percent efficient while our hearing is ten percent efficient, then real music reproduction might be possible.