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Does someone know at what frequency an open A string vibrates?

Discussion in 'Miscellaneous [BG]' started by Blackbird, Jan 12, 2002.


  1. Blackbird

    Blackbird Moderator Staff Member Supporting Member

    Mar 18, 2000
    California
    Is it 220 hz, one octave below A440 or is it lower?
     
  2. notduane

    notduane

    Nov 24, 2000
    Location
    On a "bass", I think it's 55Hz.
     
  3. Oysterman

    Oysterman

    Mar 30, 2000
    Sweden
    I think so too. No, I don't think, I know it is.
     
  4. Gabu

    Gabu

    Jan 2, 2001
    Lake Elsinore, CA
    So B is 31, E is 41 and A is 55

    The first jump is 10, the next jump is 14.

    140% of 55 = 77 so is that D?

    Is so, then would 108 be G?
     
  5. Gabu asked...

    So B is 31, E is 41 and A is 55

    The first jump is 10, the next jump is 14.

    140% of 55 = 77 so is that D?

    Is so, then would 108 be G?


    You don't have a representative sample - but I like your thinking :)

    The interval between steps in an octave is based on the twelfth root of 2, which means the ratio between a note and a note one step higher is 1.05946309436. If you want to use a rough approximation, 18/17 is pretty close. Since a bass guitar is tuned in fourths, the frequency interval between strings can be expressed as

    CAUTION: Math ahead...

    1.05946309436^5, or

    1.3348398541744739198966537767476

    which is way too long for our calculations, but if you plug it into the calculator on your PC you'll see it makes sense.

    This is the same formula used to place frets - only in reverse.

    so -

    if B0 = 30.87Hz, then

    E1 = 41.2Hz

    A1 = 55Hz

    D2 = 73.42Hz

    G2 = 98Hz

    C3 = 130.81Hz

    I know this is probably more information than you wanted - sorry about that.

    allan
     
  6. Gabu

    Gabu

    Jan 2, 2001
    Lake Elsinore, CA
    Thanks for the info! Math doesn't bug me. :) Cool to know how it works!
     
  7. RAM

    RAM

    May 10, 2000
    Chicago, IL
    Yeah, it works!:D

    There's a neat little trick I learned way back in music theory class...when you raise a note to its octave, it's frequency doubles. So, if an A1 is 55 hz, an A2 is 110 hz.
     
  8. oww, my head... math hurts... oww...
     
  9. A tip for the UK bassists. It's something I've done a number of times.

    If you've no other means of tuning your bass, listen closely to the hum produced by a flourescent light fitting (assuming there's one available).

    The frequency you're listening to is 100Hz. With open G @ 98 Hz, you can tune to that and be pretty close to being @ concert pitch. The band then tunes to the bass:D

    John
     
  10. Oh what a clever lot you are!!!

    Three cheers for Talkbassers! :)