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Hi I'm trying to understand modes and I've got a basic question:

if you are working with C scale (so this will be your Ionian), do you call the next one C Dorian or D dorian?

the two scales I refer to are:

C D E F G A B C (called "C Ionian" or maybe even C Major I guess?) and

C D Eb F G A Bb C ("C Dorian"??)

Hope it makes sense..

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marked as duplicate by Ulf Åkerstedt, Sergio, Jason W, luser droog, Dave Oct 23 '13 at 16:13

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What do you mean, "Next one?" - it will depend on what you are trying to do. –  Dr Mayhem Sep 27 '13 at 11:22
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I would have thought a quick trip to en.wikipedia.org/wiki/Properties_of_musical_modes would answer this. –  Carl Witthoft Sep 27 '13 at 12:01
    
You're right about the example you give being C dorian, but when you're keeping the root the same, "next" should consider the order of flats and sharps; in other words: Lydian - Ionian - Mixolydian - Dorian - Aeolian - Phrygian - Locrian in order from most sharp to most flat. You'll note that the pitch alterations are consistent with the "order of flats" and "order of sharps" used in key signatures around the circle of 5ths. –  NReilingh Sep 27 '13 at 16:13
    
@NReilingh- would I be right if I said that C Ionian had 0 #or b. C Dorian had 2b. C Phrygian had 4b. C Lydian had 1#. C Mixolydian had 1b. C Aeolian had 3b. C Locrian had 7# ? –  Tim Sep 27 '13 at 16:40
    
Or is C Locrian 5b ? That puts your order as in circle of 5ths. –  Tim Sep 27 '13 at 16:52
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3 Answers 3

Taking C major/C Ionian as a start point, as in C D E F G A B C, the mode starting on note 2, D, using all the same notes, will be D Dorian. This is sometimes, confusingly, called 'the Dorian of C'. You , I think, are finding 'the Dorian of Bb', which will start on C, and use the notes from Bb maj/ Bb Ionian.Thus, the notes involved will be C D Eb F G A Bb C.

With modes, I feel it's more straightforward to refer back to the 'parent key'. As in, for example, C ionian- C maj. D Dorian - C maj. E Phrygian - C maj. F Lydian - C maj. G mixolydian - C maj. A Aeolian - C maj. B Locrian -C maj.Each of these modes uses exactly the same notes as each other - as in C maj.

Rather than working out the tone/semitone spacing for each mode, it's done for you if you refer back.Looking at the 8 notes in an octave, spread round a circle, starting at a different point will give you a different mode.This obviously works for each and every major, just need to put in the appropriate # or b. E.g. G Dorian comes from F maj., and will have a Bb in it.

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C Dorian is

C D Eb F G A Bb

D Dorian is

D E F G A B C D

So D Dorian has the same notes as your C Ionian, but you are starting from a different position.

I am not sure what you mean by "Next" in the context of your question, though.

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Unrelated question: do people typically use "Ef" to indicate E-flat? I tended to type "Eb" on the theory that a lower-case "b" looks vaguely like a flat-sign. –  Carl Witthoft Sep 27 '13 at 11:54
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It's unusual, and it had me confused for at least 2 seconds... –  Tim Sep 27 '13 at 11:58
    
I had thought that that was what was used to give us a flat in markdown. fixed now. –  Dr Mayhem Sep 27 '13 at 12:56
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Each mode is defined by its pattern of tones and half-tones. The notes played depend on the tonic of the scale (= where you start).

If you play a C scale in Ionian mode, it means that you start on C and then follow the Ionian pattern of tones and semitones. The scale is the set of notes that you play, so the "next" one does not really mean something. If you want to stay C scale, you can start on C and play anoter mode (= another pattern of tones/half-tones).

If you want to start on the next note of the scale, keeping the same mode, start on D and keep the pattern of tones and semitones you used for the Ionian scale.

Most of the time, a piece of music tends to use only one or two modes, but can change the key (= scale, = subset of keys played) several times in the same piece.

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Not sure about the downvote; this looks correct to me... –  NReilingh Sep 27 '13 at 16:09
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