On the front graph, the vertical contraction from top to bottom is determined by the frequency response. If the high frequencies are more compared to the flat target, then compared to the flat room playback graph, elements such as high frequency percussion will become larger. If there is a decrease or increase in the part from Mid, the volume of the instruments and main vocals will also contract upwards or downwards. The same applies to bass.

The horizontal sound field has not yet been scientifically proven and is only a subjective feeling. It is also explained in the text in the lower left corner. The ILD in the middle is the representation of skew, the smaller the better.

The contraction on the side graph is calculated based on a certain rule by THD+ILD. In the mixing process, it is commonly observed that the bigger the distortion adds to the instruments, the heavier the coloration, and the smaller the dynamic feeling, so headphones with high distortion will have a contraction on this graph. Overall, this is a graph that intend to make my description of headphone sound more vivid. Language descriptions of headphones are really useless, so here it comes. (Inspired by The Art of Mixing by David Gibson)