"A little knowledge is a dangerous thing." And an excess of knowledge, without proper context, can be even more confounding. Plus, I think the email lost some of its formatting in transit. If I were you I might start with a basic definition of equal temperament, and perhaps use the theoretical A3 and A4 as examples of how Hz double as octaves ascend. Or suggest he go to Wikipedia or his library for further details. Good luck, Patrick Draine On 12/18/06, mps at usol.com <mps at usol.com> wrote: > How would one explain this to a client in layman's terms? > > > > Equal temperament bearings (all figures in Hz)
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