Author's Note: I'm hoping this is not too obscure... it's possible that only those who can read music will understand.
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The time signature has been changed from 3/4 to 4/4. For those of you a little less familiar with music means that the numbers at the beginning of the music tell the musician that there should be 4 quarter notes in each measure. But if you look at the music that follows, there are only 3 quarter notes per measure.