Musical Rule of Thumb and Related Features

According to Rules of Thumb listed in "The Influence of Musical Structure on Emotional Expression", 4 main factors are emphasized here: Dynamics (or loudness), Rhythm (or Beat), Pitch, and Harmony. Comparing with our feature sets extracted before, similar meaning but with different terminology should be considered together. Musical feature table could be check in past study, briefly, Dynamics is related to F31~F35; F50~F55, Rhythm is related to F1~F6, Pitch is related to F26~F30; F42~F49, Harmony is related to F40~F43. As figure shown here, we separate our data sets into another group sets with new sub-set's label:. For example: Dynamics+, Dynamic-, and unknown. Similar reason by analogy. Thus, super-group is illustrated here, and it represents that these super-groups are mutually dependent because there is no clear on-off boundary for any label. And, the rule of thumb using descriptive and qualitative level terms like: Loud and Soft is restricted to quantitative research. However, these cues are convenient for me to find the local optimum occurring in some possible and reasonable sub-set. I claim that each class having its own representative attribute easily perceived by human, however, it should be explored and reconstructed by me. These boundaries are nonlinear and maybe case by case. Thus, I think 200 musical samples are still too small to see the obvious tendency. And, process of feature extraction should be reexamined.