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Topic: Tonal Frequencies, half-step increments?? |
Smiley Roberts
From:
Hendersonville,Tn. 37075
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Posted 19 Aug 2003 10:29 pm |
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Sure,we all know that "A" is 440,but what's "Bb","B","C",etc,etc.? Can anyone post a 1/2 increment list of the tonal frequencies,right up the scale? Thanx in advance.
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©¿© It don't mean a thang,
mm if it ain't got that twang.
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Jim Smith
From:
Midlothian, TX, USA
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Smiley Roberts
From:
Hendersonville,Tn. 37075
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Posted 20 Aug 2003 7:59 am
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Thanx Jim. Curiously,I'm wondering why they would start that chart with "C#/Db",& not with "A"? Isn't "A" considered the standard reference note that symphony orchestras tune to?
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~ ~
©¿© It don't mean a thang,
mm if it ain't got that twang.
www.ntsga.com
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David Doggett
From:
Bawl'mer, MD (formerly of MS, Nawluns, Gnashville, Knocksville, Lost Angeles, Bahsten. and Philly)
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Posted 20 Aug 2003 8:23 am
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| The A that is the standard reference for orchestras is the A 440 near middle C. It is over in the middle of the chart, toward the right. The C#/Db they started on at the low end is so low most people can't even hear it. This is down in the range of giant bass drums or other types of percussion sounds. Why did they start there? I guess they had to start somewhere. |
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chas smith R.I.P.
From:
Encino, CA, USA
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Posted 20 Aug 2003 9:12 am
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A-440 is the A above middle C. Nobody hears the C#-4.331. Our hearing is typically from 20hz to 20,000hz, although some people, usually woman, can hear higher frequencies up to 23-25K. Any thing below 20hz is considered "infra-sound" or subsonic and you feel it more than hear it, what you hear are the upper partials.
For Tempered tuning, the distance between the half steps is the 12th root of 2, which is 1.05946. So if you multiply 440 x 1.05946 = 466.16376 which is Bb. If you divide 440 / 1.05946 = 415.3046 which is Ab. |
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Jeff A. Smith
From:
Angola,Ind. U.S.A.
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Posted 20 Aug 2003 10:32 pm
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| The lowest note (A) on most pianos is supposed to be 27.5 hz. That gives a good reference point. With stretching in the bass, it would actually be a little lower. |
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