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Interval question

Discussion in 'General Instruction [BG]' started by yyz, Aug 4, 2005.


  1. yyz

    yyz

    Aug 17, 2004
    Bumpass, Virginia
    Hey everybody, I just got a theory book and according to one of the examples in the book an F and a B are a perfect 4th. I've been playing music all my life and if I'm correct, I think that's wrong. That would be a diminished 5th, right? Could someone please elaborate? Thanks a lot.
     
  2. Kelly Coyle

    Kelly Coyle Supporting Member

    Nov 16, 2004
    Mankato, MN
    Yup it's wrong. Yer cool. (You could call that interval an augmented fourth if you needed it to be a fourth. Or a tritone.)
     
  3. yyz

    yyz

    Aug 17, 2004
    Bumpass, Virginia
    Damn book. I think they meant to put a flat in front of the B. Good book despite that though.
     
  4. Tash

    Tash

    Feb 13, 2005
    Bel Air Maryland
  5. djcruse

    djcruse

    Jun 3, 2002
    Norwood, MA
    It wouldn't be a diminished fifth. In this case it would be an augmented fourth. Your ear hears them the same, but in terms of notation they are different.

    Why? The interval from F to B (provided they are in the same octave) is always some sort of fourth. Perfect, diminished, augmented, etc., - always a fourth. F to C would be a fifth.

    But from what you describe it just sounds like a typo.