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Re: Music Glossary - 1.64 Concert Pitch (2.12.2)

 From: Anthony W. Youngman Subject: Re: Music Glossary - 1.64 Concert Pitch (2.12.2) Date: Fri, 3 Apr 2009 23:49:23 +0100 User-agent: Turnpike/6.05-U ()

```2009/4/3 Anthony W. Youngman <address@hidden>:
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```In message <address@hidden>, Anthony W. Youngman
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Ow!

Sorry, reading this was painful (I play the trombone, as many of you know
:-)
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Replying to myself ... Just in case anyone didn't realise (and I certainly
didn't make myself clear :-) these are my revised versions that I think
should replace the existing entries. Feel free to edit and improve.
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```For example Concert A is 440Hz, the speed of sound in air is 343m/s,
therefore an A clarinet (or any other A wind instrument) will have a length
of 343/440 = 78cm. (Or be a power of 2 longer or shorter.)
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Concert A is definitely not the fundamental for an A clarinet: it's a
cylindrical tube stopped at one end, so the wavelength of the
fundamental is four times the length.  Since the lowest note on a
clarinet is usually the E below middle C unless it has an extension,
the fundamental would be C sharp (D on a B flat).
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Ummm ... I think I might be getting physics fundamentals confused with musical fundamentals. But I'm COMPLETELY puzzled at your statement that the wavelength of the fundamental is FOUR times the length. I would guess the trombone is also "a cylindrical tube stopped at one end", and the wavelength of any note played must be an integral number of half-wavelengths. So we have 1/2-wavelength giving me a pedal Bb, 2/2 giving me the fundamental Bb, and 3/2 giving me an F.
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I don't see how the physics would work to give you a quarter-wavelength as you claim.
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Concert A would be either the first (B flat clarinet) or second (A
clarinet) overblown note, i.e., third harmonic of  E or F.
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Mmmm... I think that explains a lot. Most notes played by brass instruments are "overblown" in the wind sense - do most wind instruments mostly not overblow?
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Regards,
Neil
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Cheers,
Wol

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(NB - it's my bedtime, apologies if I don't reply again to anything for a while :-)
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