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This is more of a music theory question, but I'm working on a music application, and I've been wondering which key signatures I should be using for non-Major and Minor scales. For instance, Diminished, Phrygian, etc...

My gut feeling is to stick with the major key signatures unless the scale is minor-ish, but I'll admit that I'm a little lost...

Any ideas?

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migrated from Jan 27 '14 at 15:15

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For the various modes it is customary to use the signature of the corresponding Ionian (major).

In other words, all the following scale share the same signature (i.e. without any sharp or flat):

  • C major
  • D dorian
  • E phrygian
  • F lydian
  • G mixolydian
  • A minor
  • B locrian
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Thanks, that's exactly what I needed! Just to make sure I've got it, would the following keys also share key signatures: C#major, D#dorian, E#(reallyF)phrygian, F#lydian, G#mixolydian, A#minor, and B#(reallyC)locrian? – Pirripli Jan 16 '11 at 19:11
I think so, yes. – Sklivvz Jan 16 '11 at 19:25
awesome, thanks! – Pirripli Jan 16 '11 at 19:29

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