See this IS one great idea out of this "test"... I believe this is a result that horns where the test does not work may have a large array of overtones that "affect" the quality of the sound which would make them brighter or brassier. This is where further testing of the Dr. Mark idea, may become practical. If frequency's can be correlated to this "simple" test, then some one wanting a more pure tone instrument (less brighter, mellower, darker, pick your term) could go to a music store and "tune a bell" with the ping of a finger, find the tuning characteristic of the leadpipe and it meets perfect tune criteria for a less brighter horn. So the buyer goes up to the store keep and says, "I would be interested in trying this horn". A horn that would not pass this simple test, will be left in the display case. In medicine this concept is done time and time again. If you have arthritis, we screen with ANA testing. If the test is negative, we move on as there is a 98% chance you do not have lupus causing your arthritis. Screening for a characteristic you desire (or don't desire) is an acceptable practice, so this is why I see merit to Dr. Mark's idea, and will go to the other end of the spectrum and call it a brilliant idea, just as there was an idea of brilliance in the persons that taught us physicians how to evaluate a patient for arthritis. Anyone with arthritis out there I bet could really appreciate this concept, because I cannot believe such an arthritic person would call their doctor stupid for practicing these same concepts.