I got a real chuckle out of "Mahler 123's" comment : "Hearing the spit clog a horn player's instrument is interesting, but ultimately distracting." Years ago, when my wife was still my girlfriend, I took a real chance when I pointed out to her that the water that accumulates in brass instruments is condensation --- not spit ! The remark has never been forgotten ! All of my trombones work that way.
The basic law of physics that states that no two objects can occupy the same space at the same time can be expanded to encompass the dilemma in which we find ourselves as the number of performers increase in an ensemble. No listener can be in two listening positions at the same time either. If you are close to one performer in order to experience intimate detail of their sound you will necessarily preclude experiencing the same intimate detail from the other performers in the ensemble. It is a reality with which we must deal that increases with the size of the ensemble. Normally, we would say that we heard the "??? Orchestra" last night, not that we heard the first row of the "??? Orchestra" last night. Another problem that must be faced is when a large ensemble is being recorded and the recording engineer chooses to use multiple microphones. The resultant phase distortion, as sounds from different instruments hit different microphones at different times creates a blurred image of what is really going on because the process is unintentionally attempting to emulate the impossible idea of a single listener in two [or more] different places at the same time. In a symphonic setting, a person cannot be next to the concertmaster, the first clarinetist and the tympanist at the same time except in the magic world of the recording engineer and the twist of a knob. Experiencing a live symphony concert from a position from which all instrumentalists can be in visual contact is the best compromise and has the added benefit of minimizing the natural phase distortion that such a large ensemble presents to the listener. Smaller ensembles are best for clarity and perception of presence. It is just Nature's Law.