What are the possible aspects of music you can hear?
Frequency
Amplitude
Duration
Accuracy to original signal
These are exceptionally easy to test, the flavor of wine is impossible to test we don't even know exactly how taste or smell actually work.
Audio is simple to test and duration is the part of physics that mankind is the most adept at, musicality, fluffy descriptions of ambiguous terms only cost you money and show how gullible we are.