Good topic--very important for older audiophiles to eliminate fatiguing distortion from their audio chain. Clarity of sound improves sensory interpretation of sound. I do believe in the idea that more music listening improves perception of sound, if not acuity, because more synapses are formed as we carefully listen. As more synapses are formed through learning new information in life, your brain becomes stronger as new information is committed to memory. In my experience, at least, I feel I hear my music better as I listen more often. Much has been learned about the brain's adaptive powers.