Dan,it has nothing to do with the actual sound of live music,which is influenced by hall,acoustics etc.Live is,well,live!!Of course it is the best,but NOT reproduceable!!What I mean is that,as you gain experience,you can notice the little things that a "music reproduction system" can do,if really well set up.For ex:I can tell when my cartridge downforce/vta/damping is off.To me,this is the sound (exagerated,of course)of a rock being dragged through a plowed groove!!You lose that sense of beauty in the music,here.Flutes lose air,harp notes suck,and small bell tones sound hard.Sometimes it is easy to confuse this resonant,yet inaccurate sound,with greater air,or dynamics,or life.Wrong!I can pick up un this in other set-ups too.Same goes for line condition interactions,as well as room acoustics,etc!!There is a host of plagues we don't know we have until we hear someone with a better set-up.Then we have a chance to correct our own problem,should one(usually there's quite a few,we didn't realize we had)exist!!
Best regards!