Sound production is the artistic and technical aspect of broadcasting that is completely subjective. The balance of the sound elements, for example the voices (commentary), as compared to the volume levels of the sound effects and music, is subjective to the point until you cannot hear and understand what is being said.
As a sound practitioner, I express the tone of a production using equalization to adjust the bass and treble of an audio passage, however my experience guides where I ultimately make a subjective evaluation of the proper level and tone of any adjustments.
