There is no reason for a test of perception like this to be blind. You are not trying to isolate a scientific truth, but engaging a lifetime of biased neural

There is no reason for a test of perception like this to be blind. You are not trying to isolate a scientific truth, but engaging a lifetime of biased neural pathways with the goal of maximum enjoyment. When listening to music in the real world, your biases will affect your perception so trying to remove specific ones in the name of science is only muddying your measurement of actual preference.