Maybe the next step should be to train dogs to pick the best sounding speaker out of a line-up.
"There are reports of dogs that had definite tastes in music and some sense of what constitutes good music. A bulldog named Dan was owned by George Robinson Sinclair, the organist at Hereford Cathedral in London. He was a friend of Sir Edward William Elgar, best known for writing Pomp and Circumstance and Land of Hope and Glory. Elgar developed a fondness for Dan because he felt that the dog had a good sense of musical quality. Dan would frequently attend choir practices with his master, and would growl at choristers who sang out of tune, which greatly endeared him to the composer."
https://www.psychologytoday.com/us/blog/canine-corner/201204/do-dogs-have-musical-sense
"There are reports of dogs that had definite tastes in music and some sense of what constitutes good music. A bulldog named Dan was owned by George Robinson Sinclair, the organist at Hereford Cathedral in London. He was a friend of Sir Edward William Elgar, best known for writing Pomp and Circumstance and Land of Hope and Glory. Elgar developed a fondness for Dan because he felt that the dog had a good sense of musical quality. Dan would frequently attend choir practices with his master, and would growl at choristers who sang out of tune, which greatly endeared him to the composer."
https://www.psychologytoday.com/us/blog/canine-corner/201204/do-dogs-have-musical-sense