Interval question

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

  1. 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


    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


    Feb 13, 2005
    Bel Air Maryland
  5. 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.