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Conference napalm::guitar

Title:GUITARnotes - Where Every Note has Emotion
Notice:Discussion of the finer stringed instruments
Moderator:KDX200::COOPER
Created:Thu Aug 14 1986
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:3280
Total number of notes:61432

771.0. "Harmonic / Frequency Theory" by FNYADG::PELLATT (Just what is it with Turkey ?) Fri Aug 12 1988 07:12

    Hi, I'm quite interested in harmonic theory etc and I'd like to
    know how the frequencies of each note are related.
    
    Can anyone provide me with a list of example frequencies for all
    twelve notes ( i.e. A = 440 Hz, A# = ??? etc... ).
    
    Also, how can you compute the frequency difference between notes ? e.g.
    what happens to the frequency when you raise pitch by, say, a P4 ?
    
    Any help, or pointers to references ( this may not even be the right
    place to ask (8^) ) will be appreciated.
    
    Thanks in advance, Dave.
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771.1Physics problemANT::JACQUESFri Aug 12 1988 12:219
    I'll have to check through my Physics book. I have a book at home
    entitled "The Physics of Music". It's a little paperback book.
    I think this was covered in Heat, Light, and Sound (Physics II),
    but I don't remember the formulas off hand. 
    
    Any particular reason you ask, or is it just for curiousity sake?
    
    Mark
    
771.2Factor of 12th root of 2.FLOWER::JASNIEWSKIMon Aug 15 1988 14:0710
    
    	Each note in a chromatic scale is seperated in frequency by
    a multiple which is the twelth root of 2. The way you get to A#
    from A=440hz is to multiply 440 by 12 Root 2. To get to G# from
    A=440, divide by the 12 Root 2 factor.
    
    	You can generate all the frequencies in this way -
    
    	Joe Jas
     
771.3Now, where's my calculator...FNYADG::PELLATTJust what is it with Turkey ?Tue Aug 16 1988 09:317
    Re .2
    
    Aha ! Should've been obvious really ! That's what I was after...
    
    Thanks Joe,
    
    Dave.