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Author Topic: newbie having confusion with matching notes to C/G  (Read 2688 times)

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Steve_freereeder

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Re: newbie having confusion with matching notes to C/G
« Reply #20 on: May 02, 2020, 03:49:02 PM »

My terminology was incorrect.  Thanks everyone for your reply.  I have it figured out now.

Excellent! Good luck with your playing. Do stick around and let us know how you are getting on.
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arty

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Re: newbie having confusion with matching notes to C/G
« Reply #21 on: May 02, 2020, 04:04:32 PM »

In IPN, C4 is always middle C.
I think we got that now. Thank you.

If I might add an aside....I had an Uncle, who was a composer and a really accomplished musician. He used to refer to 'Middle C' as 'Four Foot C'. I asked him once, why he called it thus and his answer was, 'because the length of the Middle C pipe on an organ is Four feet'.
I am wondering if this is the reason it is referred to here, as C4 ?
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Sebastian

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Re: newbie having confusion with matching notes to C/G
« Reply #22 on: May 02, 2020, 04:41:53 PM »

I am wondering if this is the reason it is referred to here, as C4 ?
No, that’s not related. If you really want to dig into note naming conventions, you could start there: https://www.dolmetsch.com/musictheory1.htm
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Dick Rees

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Re: newbie having confusion with matching notes to C/G
« Reply #23 on: May 02, 2020, 05:24:16 PM »

In IPN, C4 is always middle C.
I think we got that now. Thank you.

If I might add an aside....I had an Uncle, who was a composer and a really accomplished musician. He used to refer to 'Middle C' as 'Four Foot C'. I asked him once, why he called it thus and his answer was, 'because the length of the Middle C pipe on an organ is Four feet'.
I am wondering if this is the reason it is referred to here, as C4 ?

I think it's coincidental.
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Tone Dumb Greg

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Re: newbie having confusion with matching notes to C/G
« Reply #24 on: May 02, 2020, 05:44:54 PM »


If I might add an aside....I had an Uncle, who was a composer and a really accomplished musician. He used to refer to 'Middle C' as 'Four Foot C'. I asked him once, why he called it thus and his answer was, 'because the length of the Middle C pipe on an organ is Four feet'.
I am wondering if this is the reason it is referred to here, as C4 ?

Erm, I think that would make the octave C below middle C C8 and the octave C above it C2.
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Sebastian

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Re: newbie having confusion with matching notes to C/G
« Reply #25 on: May 02, 2020, 06:39:57 PM »

Erm, I think that would make the octave C below middle C C8 and the octave C above it C2.
;D Yes.

(In reality, middle C is produced by a two feet pipe.)
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Peadar

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Re: newbie having confusion with matching notes to C/G
« Reply #26 on: May 02, 2020, 07:25:50 PM »

Two foot pipe....Closed or open? A closed end two foot pipe produces the same natural frequency as an open ended four foot.

And I genuinely don't know whether organ pipes are closed or open. I do know that the enormous organ pipes that many 18th - 19 th  century church organs exhibited were dummies with the rather smaller working pipes hidden behind them.



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Sebastian

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Re: newbie having confusion with matching notes to C/G
« Reply #27 on: May 02, 2020, 08:12:54 PM »

Two foot pipe....Closed or open?
Ok, let’s get technical.  ::)

Wavelength in m is velocity of propagation divided by frequency. Velocity of sound in air under normal pressure and at 20° C is around 343 m/s. The frequency of middle C is about 262 Hz. The wavelength of middle C therefor is ca. 1.31 m.

The foot measurements for organ registers refer to normal organ pipes (principals). They are open pipes. Acoustically they have to open ends, thus producing one node at each end. Therefore the wave-length they produce is twice the acoustically effective pipe-length.

To produce a wavelenght of 1.31 m, you need a pipe of ca. 65 cm. A foot in organ building is ca. 32 cm. Therefore you need a 2' pipe to produce middle C.

A closed pipe has one open end and one closed end. They produce one node at one end and one antinode at the other end. Therefore the wave-length they produce is four times the length of the pipe. To produce a wavelength of 1.31 m, you need a pipe of ca. 32.something cm or 1'.
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Re: newbie having confusion with matching notes to C/G
« Reply #28 on: May 02, 2020, 08:15:25 PM »

And I genuinely don't know whether organ pipes are closed or open.

Both.
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tirpous

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Re: newbie having confusion with matching notes to C/G
« Reply #29 on: May 02, 2020, 08:32:09 PM »

Quote
I do know that the enormous organ pipes that many 18th - 19 th  century church organs exhibited were dummies with the rather smaller working pipes hidden behind them.

There may be instances of dummy pipes, but I think the visible pipes can also be part of a working organ stop.  This stop is called 'montre' (=show) in French.
« Last Edit: May 02, 2020, 08:38:37 PM by tirpous »
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Re: newbie having confusion with matching notes to C/G
« Reply #30 on: May 02, 2020, 10:50:57 PM »

Where's Owen when you need him?
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Peadar

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Re: newbie having confusion with matching notes to C/G
« Reply #31 on: May 02, 2020, 11:34:49 PM »

Sebastian- Thank you for getting technical. Clear and concise. Very much appreciated. (:)
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