That was a great piece of concise information - thanks for posting it! It also confirms and partly explains what I have found when recording myself and then listening to the results - they're sometimes quite different from the perception I have when I'm behind the horn playing against a flat surface - best of which is the mirror (evenest of surfaces to get sound feedback, but unfortunately also giving you visual feedback...). I really should have closed my eyes, and I will in the future. But of course, the mixture of direct and indirect feedback you get while playing will always cloud your ability to judge your own sound.
Bottom line: For judging your sound, *really* close your eyes (meaning: don't even start bothering for looks, materials, surfaces - whatever). This is important news for recording artists - but I bet *they* know...
But the disturbing thing about this effect is the following: All this also means that the audience will judge part of what they hear by what they see, no matter what we do (or they do, for the matter). So there actually *will* be an effect to the finish and appearance of the sax, mouthpiece, accessories - and player! No way past it...
M.