The "in the hall of the mountain king " by Greig achieves unity through the eyes of a perceptive listener. We can hear that as the piece progresses the dynamics increase from a mezzo-piano to a fortissimo. As a critical listener the tempo increases through an accelerando this ties well with is forte that the middle of the piece encounters. As a casual listener, the pitch is entertaining and unexpected. As the piece progresses we can see the many layers he adds. As a referential listener, we can tell that the timbre repeats itself to the same frequency(vibrato). I feel an upbringing connotation, this piece brings life to me.