The right notes have a physical sensation, a resonance we can feel in our chest and sinuses. Music-making is a very physical experience. There are many physical sensations of singing. Breathing changes when we sing. We become conscious of it, as we are when we're exercising.
Physiological changes produce other bodily responses.
Some feel an urge to make large muscle movements in legs, hips and belly. In other ways too, the body seems to want to move, to stretch or bounce or swing with the music. Not all the physical sensations that accompany singing are pleasant. Sometimes we strain and tighten the throat to force out notes that seem too high, for example. Sometimes simply singing loudly or trying to stay with the long, long phrases an organ can play will make us breathless, lightheaded and dizzy.