what is this?

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nagant27
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what is this?

Post by nagant27 » Mon Jul 23, 2018 6:25 pm

So I came across this :
picture1.JPG
The tuning table speaks for itself, but what about the extra long reed block "thing" on top of it? It was on top of the tuning table, and was wondering if anyone ever saw one before, and how it was used. Its a bout a yard long. I'm guessing it was for tuning, but I really don't know. On the underside there is a pallet that can be opened and closed by the lever on the top of each reed, as shown in the picture. Looks really well made, and by hand so it took a lot of time I am sure to fabricate.

xocd
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Re: what is this?

Post by xocd » Mon Jul 23, 2018 7:03 pm

Looks like a reed bank for a pump-organ (aka. reed-organ).
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WaldoW
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Re: what is this?

Post by WaldoW » Tue Jul 24, 2018 4:33 am

Looks to me like it's a tuning table whereby the reed to be tuned is compared to a "tone standard", generated from the reed selected on the reed block. The subject reed would be compared to the reference reed (via tremolo effect) and adjusted accordingly. System predating electronic methods.

Press on....
Waldo

TomBR
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Re: what is this?

Post by TomBR » Tue Jul 24, 2018 8:42 am

Like WaldoW said.
I believe it's called a provino

nagant27
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Re: what is this?

Post by nagant27 » Tue Jul 24, 2018 10:02 pm

Thank you, makes sense. Good to know. In the day tuning an accordion was a total different experience I imagine. Tuning forks, time, and a good ear!

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Re: what is this?

Post by TomBR » Wed Jul 25, 2018 9:28 am

I guess the provino was tuned by reference to a tuning fork, or forks, by the same skills as used by a piano tuner.

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debra
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Re: what is this?

Post by debra » Wed Jul 25, 2018 10:50 am

TomBR wrote:
Wed Jul 25, 2018 9:28 am
I guess the provino was tuned by reference to a tuning fork, or forks, by the same skills as used by a piano tuner.
Could be, but a skilled tuner only needs the tuning fork. You start by tuning the A (440Hz or whatever you want) and then you go from there with quints (making octave jumps to stay within the same octave), using a beating frequency (tremolo) of about 1.5 beats per second, to perform the "well tempered" tuning. Of course nowadays just using an app makes this a lot easier...
Paul De Bra (not Debra...)
http://www.de-bra.nl

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Re: what is this?

Post by WaldoW » Mon Jul 30, 2018 5:59 am

Paul,
How does "Beats per Second" relate to tuning "Cents", number wise?

Waldo

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