Mike Morrin wrote:
> (does the frequency get bigger or smaller when the length gets
> bigger?).

Smaller.  Larger organ pipes are lower frequency.  There are all sorts
of standing wave tricks as well according to how the pipe opens at the
end, if indeed it is open.  To remember, think of a piccolo versus a
flute.

I did physics of music for a year or so way back when.

--
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