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Thread: Tempo doing my head in

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    Admiral of Fugues Contratrombone64's Avatar
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    Tempo doing my head in

    OK - got a piece in 6/8 where the dotted minim (dotted half note for the yanks here) equals metronome 60. So every bar takes two seconds to play (got it?). Now the tempo changes to 3/4 but the relative speed of the quavers (8th notes) doesn't change from what they were previously in 6/8: what the hell does the tempo of the chrotchet (quarter note) become. I tried to figure it out logically and my brain performed a CTRL-Alt-Del on me ... David
    I'm not an atheist and I don't think I can call myself a pantheist. We are in the position of a little child entering a huge library filled with books in many different languages. The child knows someone must have written those books. It does not know how. The child dimly suspects a mysterious order in the arrangement of the books but doesn't know what it is. That, it seems to me, is the attitude of even the most intelligent human being toward God.
    —Albert Einstein.

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    Admiral of Fugues Contratrombone64's Avatar
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    Come on, brains trust - I need your help?!?! Mat, Lars, Colin, Margaret!! whoever
    I'm not an atheist and I don't think I can call myself a pantheist. We are in the position of a little child entering a huge library filled with books in many different languages. The child knows someone must have written those books. It does not know how. The child dimly suspects a mysterious order in the arrangement of the books but doesn't know what it is. That, it seems to me, is the attitude of even the most intelligent human being toward God.
    —Albert Einstein.

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    Commodore con Forza Soubasse's Avatar
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    Oh bugger it, I posted then realised I did the calculations based on dotted crotchets, hang on ...

    I'm really not sure if I'm doing this right, but:

    Dotted minim = 60 therefore the dotted crotchets = 120, therefore quaver pulse would be quaver = 360 (3 x 120), therefore crotchet beat of new 3/4 tempo would be half of that quaver pulse, so crotchet = 180.

    Bothers me because the reasoning looks shonky, but I've tried it with a metronome and it sounds right to me.
    Last edited by Soubasse; Jun-23-2011 at 03:46.
    Music is made to transform the states of the soul, for an hour or an instant (J. Alain)

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    Admiral of Fugues Contratrombone64's Avatar
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    LOL - shonky indeed, at least your brain didn't turn itself off. I'll try it. thanks Matt.
    I'm not an atheist and I don't think I can call myself a pantheist. We are in the position of a little child entering a huge library filled with books in many different languages. The child knows someone must have written those books. It does not know how. The child dimly suspects a mysterious order in the arrangement of the books but doesn't know what it is. That, it seems to me, is the attitude of even the most intelligent human being toward God.
    —Albert Einstein.

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    Administrator Krummhorn's Avatar
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    I was thinking on those same lines as Matt ... but none to confident enough to stick my neck out on the chopping block, so to speak
    T'was having problems getting the 3 against 2 out of my noggin on this, too.
    Kh ~~.
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    Admiral Maestoso marval's Avatar
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    Sorry David I have only just seen your cry for help. I wish I could help but I am afraid clueless, I am sure the advice you have had will solve your problem.


    Margaret

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    Commodore con Forza Soubasse's Avatar
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    Quote Originally Posted by Krummhorn View Post
    I was thinking on those same lines as Matt ... but none to confident enough to stick my neck out on the chopping block, so to speak
    T'was having problems getting the 3 against 2 out of my noggin on this, too.
    That was the first thing that bothered me, but technically speaking it's not 3 against 2 (as in triplet against duplet) if the quavers of the new 3/4 are the same tempo as the quavers of the previous 6/8. It's simply the same quaver beat re-grouped in twos (for the simple time sig) rather than threes (for the compound time sig). I know what you mean though, I was primarily worried I'd have to use ratios, and when it comes to working with ratios, I'm what you might call slightly crap.

    EDIT: Have also tried my above calculations with a sequencer program where I did an audio recording of the onboard metronome clicks, and then aligned each clip snapped to the timing grid. For reasons that escape me, it worked!
    Last edited by Soubasse; Jun-24-2011 at 06:00.
    Music is made to transform the states of the soul, for an hour or an instant (J. Alain)

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    Administrator Krummhorn's Avatar
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    Thanks for the explanation, Matt. I'm no good with rations either.
    Kh ~~.
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