I want to see what these songs look like in frequency space. Especially around the part where the frisson happens. I'm willing to bet they have a common frequen

I want to see what these songs look like in frequency space. Especially around the part where the frisson happens. I'm willing to bet they have a common frequency or multiple of a common frequency as a main component. Long story short, the brain does most of its representation and signaling with frequencies of brain waves. Just like certain bands of the EM spectrum are reserved for TV broadcast and other parts are reserved for WiFi etc, certain bands of brain waves are reserved for motor-sensory IO. If by sheer coincidence you come across a sensory stimulus that oscillates around the carrier wave frequency used to carry that same stimulus, you should experience some funny interference effects. Throughout evolutionary history there wasn't really a problem using these carrier frequencies because in our natural environment you're not going to accidentally run into a blinking bright light or loud sound with exactly the right pure frequency. Then we invented instruments and later electric light and oscillators. The relevant band of frequencies is around 30hz - 60hz. More likely than not the musical examples contain beat frequencies rather than directly containing sound in this part of the spectrum.