Strange overtones

Discussion in 'Trumpet Discussion' started by Sethoflagos, Aug 27, 2014.

  1. BigDub

    BigDub Fortissimo User

    4,806
    2,997
    Dec 19, 2009
    Hillsborough, NJ
    Ah, VB, I knew someone would have to bring up that wave frequency theory. So typical, so predictable. We all know this already. Please, something fresh and new. Again, we already know all this. Take the training wheels off, it's time to ride the two wheeler.

    PS, I hope you recognize sarcasm, here...............:cool:
     
  2. Vulgano Brother

    Vulgano Brother Moderator Staff Member

    Age:
    60
    12,459
    7,035
    Mar 23, 2006
    Parts Unknown
    OK. Encourage your colleagues to explore resultant tones and require them to play in tune with you.
     
  3. VetPsychWars

    VetPsychWars Fortissimo User

    3,751
    2,152
    Nov 8, 2006
    Greenfield WI
    For educational value, this principle has been used in AM radios since the late 1920s... these radios were called Super Heterodynes. They work as follows: a local oscillator is heterodyned with a received radio frequency. The local oscillator is always a fixed frequency above or below the received frequency. The resultant frequency was called an "intermediate frequency", and tuned circuits were used to resonate the IF and then the audio was "detected" and amplified.

    Neat stuff. In practice it's a lot more complex than this, but you get the general idea.

    Tom
     
  4. BigDub

    BigDub Fortissimo User

    4,806
    2,997
    Dec 19, 2009
    Hillsborough, NJ
    I'm on it
     
  5. gmonady

    gmonady Utimate User

    18,123
    9,297
    Jan 28, 2011
    Dayton, Ohio
    I waved it off... in theory
     
  6. gmonady

    gmonady Utimate User

    18,123
    9,297
    Jan 28, 2011
    Dayton, Ohio
    But first, try to tune your bell to the lead pipe.... DrMark, where are you!
     
  7. Ed Lee

    Ed Lee Utimate User

    8,040
    2,035
    Aug 16, 2009
    Jackson NC
    It's been a lot of fun to play within 6" of the wind chime on our front porch. I'm simply not worried about overtones. I'll let everyone else do the worrying. OK you can post it again.
     
  8. Cornyandy

    Cornyandy Fortissimo User

    3,139
    1,603
    Jan 9, 2010
    East Yorkshire
  9. rowuk

    rowuk Moderator Staff Member

    Age:
    61
    16,611
    7,955
    Jun 18, 2006
    Germany
    Sum and difference or resultant tones are how I describe this phenomena.

    A factoid for you all: A perfectly in tune major chord produces only resultant tones in that chord - no dissonance!
     
  10. Sethoflagos

    Sethoflagos Utimate User

    5,331
    4,732
    Aug 7, 2013
    Lagos, Nigeria
    I believe this is true for just intonation, but not for equal-tempered
     

Share This Page