Okay - so today, as a follow-on to an otherwise unrelated conversation, I found out the primary difference between a recorder and an ocarina; a recorder is a tubular resonance chamber where the pitch generated is related to the length of the bore and the open holes, which change the resonance frequency by changing the size of the resonance chamber; while an Ocarina always uses the full resonance chamber, but the pitch generated is related to the ratio of the area of the uncovered holes against the volume of the resonance chamber. Because of its nature, the location of the holes and the shape of the resonance chamber have far less effect on the tone than the material of the chamber and the size of the holes... And from an aesthetic and mathematical point of view, I find it fascinating.
I have to investigate this more.
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