06 September, 2010

Remember when I was talking about ring modulation? Again?

It was in this post. I said the A♭2 (103.125Hz) was ring modulated with an carrier oscillator pitched to D♭3 (137.5Hz). After doing the math (remember that ring modulation simultaneously adds and subtracts the frequencies from the carrier oscillator to the frequencies of the instrument), I came up with frequencies of 240.625Hz (halfway between B♭4 and B4, the VI and vii of D♭ respectively) and -34.375Hz (but you can't have negative frequencies, so that negative symbol is irrelevant and we're still hearing a D♭1, a full octave down).

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