What is the best way to get a "true" sound ?

IIt seems like an impossible question that I'm asking, and Im not even sure if I can word it the way I want to.

Maybe I should just start with what I want the end result to be.



hmmm....ok, I make a track, and it sounds different in every room, in a car, in a hall , through headphones......and I understand its the acoustics and reverberations of the signal bouncing off the walls.



Is there any way to deduce what is the actual, real sound ? , i.e. , what it sounds like without reverberations and room colouring ?

I love how my tracks sound through headphones , but , as there are so many headphones with different colourations and frequency responses , how can I know that what I hear is how it really "really" sounds ?



Its a bit like trying to explain purple to a blind man , or the taste of chicken to someone who's never ate chicken before.



I've toyed with tools like voxengo span, and i think a multitrack version of something like that, may go some way to helping me reach that fundamental common denominator, so that it sounds great wherever its played.



Can anyone recommend a really good multitrack analyser , and also maybe help me with this question ?



ps. I live in rented accommodation so any soundproofing / noise cancellation work I may have to do , can only be free-standing, and not attached to any walls etc....



Thanks

What is the best way to get a "true" sound ?