Three observations:

1. Thanks for introducing me to Nero and Promises. Your right about how the interaction of music and whatever we’re doing at a particular moment creates a completely different experience (though many times it conjures up a distant memory). And each individual processes that interaction in a unique way based on their life experiences.
2. Where were you driving?
3. When you speak of choice in what type of sensory input you want to experience, I would add that there is an unbelievable amount of sensory input around us that we choose to ignore. If we ever open our consciousness to absorb that input (say, for example, when you blindfold your eyes, your other senses become heightened, or in meditation, where quieting the mind might reveal the tiniest nuances in the sound of your breathing). How would you express that mathematically?