Ya don need a Bosendorfer?

[Don]

Hi Ed,

If you have two frequencies one at 150 hertz and another at 50 hertz a
"resultant" tone of 100 hertz will be perceived. This is often used in pipe
organs to simulate a 32 or 64 foot stop.

See here for an explanation of the this effect:

http://www.holistic-resonance.com/ToneTheory.html

At 05:18 PM 5/15/2003 EDT, you wrote:
>Greetings, 
>   Here is a new one on me, it comes from the piano-L list:
>
>>>Jonathan Gonder performed the Bach-Busoni Chaconne in d 
>minor.  In one of the passages, near the end of the piece, the very lowest 
>notes of the piano were heard fortissimo in a descending line which went 
>beyond the lowest A of the piano to a G.
>
>Jon said how this tone was produced, I can't remember what he said 
>other than that he struck two notes, a fourth apart, and that in doing so, 
>the low G was produced.  He said that organists do this to compensate when 
>they do not have pipes which go low enough.
>
>Can anyone explain this to me? << 
>
>
>Ideas, anyone?  
>
>Ed Foote RPT 
>www.uk-piano.org/edfoote/
>www.uk-piano.org/edfoote/well_tempered_piano.html
> <A HREF="http://artists.mp3s.com/artists/399/six_degrees_of_tonality.html">
>MP3.com: Six Degrees of Tonality</A>
>_______________________________________________
>pianotech list info: https://www.moypiano.com/resources/#archives
>
>

Regards,
Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T.

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