Hi David, With respect, there are musicians who can hear the difference between A440 and A441 without a referrence to an outside pitch source. At 09:28 AM 4/4/2009 -0400, you wrote: > It is completely impossible to hear aurally the difference between >440 and 441. Or better yet, 880 and 882. >270.11.41/2040 - Release Date: 04/03/09 17:54:00 Regards, Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T. Non calor sed umor est qui nobis incommodat mailto:pianotuna48 at yahoo.com http://us.geocities.com/drpt1948/ 3004 Grant Rd. REGINA, SK, S4S 5G7 306-539-0716 or 1-888-29t-uner
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