Dear Salt Peter,

Strictly speaking, I am a doctor that does not specialize in firing organs of this type. However, you are quite right in your assertion that the frequency will be related to the length and diameter of his Canon. Alas your informant has been misinformed as the said Canon is in D rather than G but this is of little consequence and only a minor inconvenience to the rest of the orchestra.

You will probably know that Pachebel designed his Canon to be a tool, not for the teaching of the cycle of fifths and the modulation thereby from any key into any other key (such as G), but rather to be

A regressive aid
in the regressive psychotherapies

You will notice from this page that Dr Stanislav Grof explains this very elegantly. Here is part of what he says:

"On occasion, a skillful use of music can also facilitate the emergence of specific contents, such as aggression, sensual or sexual feelings, emotional or physical pain, ecstatic rapture, cosmic expansion, or an oceanic atmosphere of the womb."

Powerful stuff, I am sure you will agree, but potentially dangerous also should you over-expose yourself to the repetitive bangings of Pachebel's Canon which could perhaps cause over-regression. Presumably this is why Dr Speyrer substituted the rather more gentle and soothing J. S. Bach's Little Fugue in G.

I presume you meant "lost art" and, if this is the case, I am afraid you are probably right. I might hazard a guess though that, if the cycle of fifths theory is correct, we probably have a case of 12 Canons in the 12 keys here.

Hoping that this has been of assistance!

Yours sincerely,

Dr. Guitar