Laurie Griffiths wrote:
>
> The "three chord trick" (pun on the three card trick, or three card monte)
> says that you can harmonise any tune with three chords. In the open key
> of C major these are:
> C major harmonises C E or G (in any octave
> G7 harmonises D F G or B (in any octave)
> F major harmonises C F or A (in any octave)
> Several of the notes (C F G) have more than one way to harmonise.
>
> This trick only works for ONE of the seven open keys (the other open keys
> being D dorian, E phrygian, F lydian, G mixolydian, A aeolian, B locrian).
>
> What would pundits see as being the equivalent three (or if need be two or
> four or whatever) chord trick for other open keys?
>
> Feel free to include gapped open keys (pentatonic etc) if you please.
How about this:
Lydian: I #IVmb5 V
(or maybe: I II V)
Ionian: I II V
Mixolydian: I IV Vm
Dorian Im IV Vm
(or maybe: Im IIm Vm)
Aeolian: Im IVm Vm
Phrygian: Im IVm Vmb5
(or maybe: Im II III)
Locrian: Imb5 IIm bV
---
Major penta: as ionian
Minor penta: as aeolian
---
Phrygian major: I II III (the "tourist flamenco" trick)
Harmonic minor: Im IVm V
Melodic minor: (needs at least four chords)
Whole tone: I#5 II#5 (just two chords!)
Dim: Imb5 IImb5 (ditto)
Chromatic: (needs at least four chords)
Frank Nordberg
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