Author: Don Poulsen
Date: 2004-06-04 15:47
John, I don't expect that there is any defined point where an A turns into a B flat, unless you are simply looking for the midpoint between the frequencies of a A and a B-flat, or the quarter tone. (It won't be exactly the average of the frequencies.)
If you are looking for a semantic answer, only the precise frequency is really an A and another precise frequency is really a B flat. Something slightly above A would be a "slightly sharp A," for example. Or, if you were actually trying to play a B flat, the same note could also be called "an extremely flat B flat".
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