Thank you for taking the time to respond to my question.
With absolute respect, I am still struggling to understand the 122 kHz bit in your answer i.e. "dynamic range that is beyond human hearing adds to the brains perception of the music"? Surely our brains are stimulated by a variety of sensory inputs such as sight, touch, smell, taste and hearing that are then converted into electrical impulses for the brain to process? If our hearing is physically limited to 22 kHz, how can our brain receive and process signals beyond this human limit? Again, I'm not wishing to seem pedantic, I'm still not understanding?