music theory question

Discussion in 'Playing and Technique' started by tedm, Sep 19, 2004.


  1. tedm

    tedm Gold Supporting Member

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    if a song sounds good with scales Am and Cm, what key is it?

    I usually think of the root, 4th and 5th notes of a scale as sounding good played major scales, and the 2nd, 3rd, and 6th, sounding good with minor scales.
     
  2. Scott Peterson

    Scott Peterson Staff Member

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    Ted,

    Let's keep things where they belong. Thank you.
     
  3. tedm

    tedm Gold Supporting Member

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    This is a better place for it. Thanks.

     
  4. Mark C

    Mark C Member

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    Cm is C,D,Eb,F,G,Ab,Bb Am is A,B,C,D,E,F,G. Four notes in common, three are different, however there are no common chords that fit both scales, so if you are playing both over a progression, you are getting some seriously outside sounding notes. This can only be cool if you know how to resolve those notes. Eg: A min and C major are the same notes. Sometimes over a C major chord, you can use notes from C minor as passing tones. This can be heard in use in both jazz (especially bebop) and country music.
     
  5. Joe

    Joe Senior Member

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    Cm is the same as Eb major

    R 2 b3 4 5 b6 b7 R

    C D Eb F G Ab Bb C
     
  6. tedm

    tedm Gold Supporting Member

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    So assuming not jazz or country, and the Cm scale and the Am scale sound OK, it's probably the tune changing keys? I'm trying to figure out what key the redant george lowell backing is in.

     
  7. tedm

    tedm Gold Supporting Member

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    I get this, I'm trying to find a common key for use with the Cmin and Amin scales, but I don't think there is one, unless the keys change in the tune.

     
  8. Mark C

    Mark C Member

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    Learn the chords in the song. They'll tell you what key it's in.
     
  9. Tom Gross

    Tom Gross Supporting Member

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    Unless it's a Blues-based thing in C (C7), then you'd get an A min thing over the C, and a C min pent sound over C7, which sounds familiar and "works".
     
  10. Joe

    Joe Senior Member

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    What note sounds like the ROOT? From there you can determine key signature and mode.
     
  11. matte

    matte Senior Member

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    The Half step Whole step scale(starting on A,C,Eb,F#)will cover both A minor and C Minor tonalities.
     
  12. tedm

    tedm Gold Supporting Member

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    But the notes in the Half step/Whole step don't sound right throughout the tune:

    A >Major Pentatonic >A-B-C#-E-G
    A >Minor Pentatonic >A-C-D-E-G
    A >Whole Tone >A-B-C#-D#-F-G
    A >Symmetric Diminished -
    *****
    >Whole step, half step >A-B-C-D-D#-F-F#-G#
    *****

    There's an F/G in the tune, and some CMaj or C7, and no D#/F#/G# I don't think.

    So are you saying for every chord, jump to another Whole step, half step scale?



     
  13. tedm

    tedm Gold Supporting Member

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    I find this true. In the redant lowell george tune, it's not sounding right to me, and it does end on a rootish sound.

     
  14. tedm

    tedm Gold Supporting Member

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    maybe parallel mode C melodic minor, and they threw in a GMaj:

    C >Symmetric Diminished -
    >Whole step, half step >C-D-Eb-F-Gb-Ab-A-B


     
  15. matte

    matte Senior Member

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    A Bb C C# D# E F# G
     
  16. Joe

    Joe Senior Member

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    In classical music they call notes outside of the key signature accidentals, it was not until jazz came along that the common man learned theory. If you play a note by accident you are sloppy, if you play it on purpose there is a reason why it does or does not work. There is a theoretical reason why your scales work in your mind, and figuring out can be fun as a braintwister, but in the end, people listening to you play are not thinking about it. Music is a an art form and when you over analyze it, it becomes a science.
     
  17. lhallam

    lhallam Member

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    A major pentatonic > A-B-C#-E-F#
     
  18. tedm

    tedm Gold Supporting Member

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    Matte,
    I will give this a try, what is this scale and key called as close as you can think of??

    Just by looking, the lack of an Eb note, and F note make it look dodgy ;)

    BTW, have you heard/played the lowell george redant backing?

     
  19. lhallam

    lhallam Member

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    Interestingly enough:

    A-B-C-D-Eb-F-Gb-G#

    also works if you like those b5's. ;)
     
  20. lhallam

    lhallam Member

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    D# and Eb are enharmonic spellings
     

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