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  1. John Bonham, So hot right now.

    Join Date
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    Default Music Theory Help: Authentic Cadences

    Im taking summer classes at my school and no ones around, tried calling friends, couldn't get ahold of anyone so I come to you guys.

    Im taking Theory II and were doing Authentic Cadences (Perfect/Imperfect/Half) and I am having trouble, anyone good with this stuff that wouldn't mind helping a fellow drummer out?

    This shouldn't be that hard but for some reason I keep getting them wrong, so many rules maybe, I don't know.

    Any help is appreciated guys thanks
    Sean

    Johnbonhamism.

  2. Registered User

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    Feb 2007
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    Perfect Authentic Cadence: A V-I in which both chords are in root position, and the melody sings/plays "Ti-Do"
    Imperfect: A V-I in which both chords are in root position, and the melody ends on something other than "Do"


    EDIT: I guess I was wrong on half cadence. It's been a while.
    Last edited by Dorian; 05-26-2011 at 12:12 PM.

  3. Registered User

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    Jun 2007
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    Newtonville, Ontario
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    Authentic cadences must have a sol - do bass (5 - 1)
    Perfect - the soprano/top note must resolve to do (1) from re/ti (2/7)
    imperfect - soprano is on mi/sol (3/5) - if soprano is on fa (4) then it must rise to sol (5), likewise with la (6) but it resolves down.
    half - last chord is a V chord.

    hope this helps!

  4. Dr. Cardboard

    Join Date
    Oct 2005
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    Default

    Just to put it in more general terms:
    Authentic Cadences overall is either a V or viidim moving to I

    Perfect Authentic Cadence is V to I with three requirements:

    1. both chords are in root position, and
    2. the soprano line (topmost voice/note) must end on the tonic (so the bass and soprano notes of the I chord will be the same note)
    3. Must be V - I not viidim - I

    for example:


    Imperfect Authentic is V to I but one of three things can be different:
    1. Inversions in either chord
    2. Soprano line ends on a note other than the tonic
    3. viidim - I instead of V - I

    e.g.


    Half Cadence: any chord moving to V
    Last edited by FORK; 05-26-2011 at 12:17 PM.

  5. Smooth μves

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    Oh man, it's been so long since I saw any music theory!
    Less, by simple definition, cannot be more. Seriously. Check the ****ing dictionary.


    www.twitter.com/MAbbottWriting
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    Incarnate, Book 1 of Ageless, due Q2-3 2016!

  6. Dr. Cardboard

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    Quote Originally Posted by Maark View Post
    Oh man, it's been so long since I saw any music theory!
    Lucky you :/ I hate theory class sooo much

  7. Smooth μves

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    I never liked it, although I did write a rather cool string quartet piece at college based on our theory lessons... It was quite nautical and jaunty. Really wish I'd kept the score for it... unless it's at home with my other college work.
    Less, by simple definition, cannot be more. Seriously. Check the ****ing dictionary.


    www.twitter.com/MAbbottWriting
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  8. Dr. Cardboard

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    Quote Originally Posted by Maark View Post
    I never liked it, although I did write a rather cool string quartet piece at college based on our theory lessons... It was quite nautical and jaunty. Really wish I'd kept the score for it... unless it's at home with my other college work.
    yeah, to me it's like the musical equivalent of math class... and I always hated math. you're lucky you got to write stuff like that though, coolest thing we've "written" so far is florid counterpoint. blech. If you do happen to randomly find that score though, I'm in a string quartet at school, if you feel like shooting a copy my way. we're always looking for stuff to distract from the endless classical.

  9. Smooth μves

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    Sure, will do. I never payed that much attention, I just used bits here and there to string some notes together in a way that seemed nice. I remember how the melodies and basses went, so I may be able to re-score it at some point. Need to get me a copy of Sibelius...
    Less, by simple definition, cannot be more. Seriously. Check the ****ing dictionary.


    www.twitter.com/MAbbottWriting
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    Incarnate, Book 1 of Ageless, due Q2-3 2016!

  10. Dr. Cardboard

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    yeah, that's the only way I ever write music as well. I hate the whole rules and standards stuff they teach us, completely takes the fun out of it imo. Really wish Sibelius wasn't so absurdly expensive, but it'd be worth it, 6.2 is insane. Funny timing actually, one of my friends posted this on facebook this morning:

    www.noteflight.com

    obviously it's no sibelius, but for a free online app it's pretty decent

  11. Smooth μves

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    Does it have a playback feature?
    Less, by simple definition, cannot be more. Seriously. Check the ****ing dictionary.


    www.twitter.com/MAbbottWriting
    www.facebook.com/maarkabbottwriting
    Incarnate, Book 1 of Ageless, due Q2-3 2016!

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