Tempo is to music as nudity is to sex, or as the weather is to the news. The mean speed is derived from √1 minute*10^-1 or the square root of three fifths of one second, √3/5" – the Universal Speed of Indecison. What's in it for *you*? If we control our mental speed, we control our mood. Emotion is simply a predictable frequency.
“in the WHITE ROOM, with black curtains, at the station” – Speed Measurements, video and seing speed “the invisible” in contemporary tempo maps or BPM GRAPHS™ as apple® calls them