Strange overtones

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

  1. Sethoflagos

    Sethoflagos Utimate User

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    I've been practising off and on most of the day after a week off, mainly pedals and a bit of multiple tonguing practice.

    Then just now I was working up some aimless tunes around the bottom of the stave when I realised that I was not alone: there was another distinct voice playing what I was playing but transposed about a minor third down.

    Resisting the obvious immediate impulse to fire up ebay and bid for a dozen mouthpieces and a couple of new trumpets, I had a bit of a think about it. Then an idea dawned. We had a new generator installed while I was away and this one has some soundproofing so its a quietish, relatively clean hum. Grid power went down a couple of hours ago, so this was the first time I'd heard trumpet and new gen together. Checking the numbers, 50 Hz off the low stave notes would be around a minor third, so I guess that's probably it. A resultant tone with the new gen.

    What was that Robin said about not being the best judge of your own sound?

    Anybody experienced something similar?
     
  2. VetPsychWars

    VetPsychWars Fortissimo User

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    Those are called sub-tones. When I play duets with someone who has good tuning, we lock the intervals together so tightly that the sub-tones are LOUD provided the room is large enough. They don't always match the chord so it drives me nuts that I can''t tune them too. :-)

    You''ll get a similar effect playing with a drone. I've used a "signal generator" app on my computer. Triangle wave seems to match the timbre of a trumpet lots better than a sine or square wave.

    Tom
     
  3. Dupac

    Dupac Fortissimo User

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    Sub-tones may appear when you play the organ, by interaction between two keyboards (often keyboard and pedalboard).
     
  4. Dean_0

    Dean_0 Piano User

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    Not experienced those thing yet , but have been practicing with the small group under a ceiling fan :shock: boy is that annoying!!

    Dean-0
     
  5. BigDub

    BigDub Fortissimo User

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    Play into a small table top fan while it's blowing. Just saying that will create some interesting feedback.
    I was once playing with two other guys that I've played with for over 25 years, and just one time we played a unison note and the wave of the note so almost perfectly in tune created such a sound. I can't really describe it, but we knew it was something special.
    Sometimes I get a strange double tone when my chops get tired and it is a distinct two note sound. Almost sounds like growling while playing can sound.
     
  6. Peter McNeill

    Peter McNeill Utimate User

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    +1 - agree with Wayne
    If playing by yourself and no fan present (exceptions to wife in vicinity), then likely tired chops can cause a sub-tonal sound to come into play, have a 10 min rest.
     
  7. barliman2001

    barliman2001 Fortissimo User

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    I always have a second tone when practising... out of my dog... he's also accompanying my wife (opera singer) when she's practising... By this time, he's pretty much in tune... a seventh above the note played or sung!
     
  8. gmonady

    gmonady Utimate User

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    A mouthpiece will not change subtones. That is a factor or the horn.
     
  9. tobylou8

    tobylou8 Utimate User

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    Euphonium player asked me to play longtones into the bell of his euphonium. Oookaaayy, why? He insisted, so I did. WOW! He depressed his valves while I played. Fastest "tonguing" I've ever heard.
     
  10. Dviglis

    Dviglis Mezzo Piano User

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    Sounds like something one of those crazy euphonium players would do...
     

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