I wrote this up a while ago, inspired by bassy bill's thread. It may help answer your question...tho bassy bill's thread is a good beginners discussion.
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Modes (for beginners)
Note: this assumes you know
1.) the major scale
2.) basic note names , flats and sharps, preferably on your fingerboard.
What are Modes?
-Modes are particular category of Scale.
-The exact musical meaning of "Mode" has changed over the centuries.
-In contemporary music theory, the modes are generally considered to be variations of the 7 note "diatonic" scale.
-The Major and Minor scales are the first examples diatonic scales we usually learn.
-Beyond the diatonic scale, a modal approach has also applied to other scales, such as the melodic minor and harmonic minor.
There are 2 ways to explain /understand modes: Realtive and Parallel.
Relative Modes:
same set of notes (one key), different root.
Usually the first way modes are learned.
For example, these modes are relative to C major:
Code:
Root Mode Scaletones
C Ionian CDEFGAB (aka C Major)
D Dorian DEFAGBC
E Phrygian EFAGBCD
F Lydian FGABCDE
G Mixolydian GABCDEF
A Aeolian ABCDEFG (aka A Minor*)
B Locrian BCDEFGA
Each relative mode is in the same key, C major in this example.
This pattern can apply to any major scale, not just C major.
Parralell Modes:
Different sets of notes (many keys), same root.
for Example, these modes are paralell to Cmajor:
Code:
C Ionian CDEFGAB (aka C Major)
C Dorian CDEbFGAbB (CMaj with a b3, b7)
C Phrygian CDbEbFGAbB (CMaj with a b2, b3, b6)
C Lydian CDEF#GAB (CMaj with a #4)
C Mixolydian CDEFGAbB (CMaj with a b7)
C Aeolian CDEbFGAbBb (CMaj with a B3,B6,b7) aka C Minor)
C Locrian CDbEbFGbAbBb (CMaj with a b2,b3,b5,b6,b7)
Each parralell mode is in a different key.
This pattern can apply to any root note, not just C.
Relative and Parallel Modes are 2 approaches to the same concept, they are *not* different concepts.
Learn to see how the 2 illustrations above are actually the same idea operating in different ways.
Points to consider:
1.) Relative modes are the simplest way to show how modes are constructed,and how they relate, but can easily be misunderstood/misused if oversimplified.
2.) Thinking in Parrallel modes emphasizes that each mode has a feel of its own, and is not "just" a major scale, but how they relate to each other may be less clear.
3.) Modes have been used to analyze what notes "work" over various chords (usually in the context of a Jazz solo)
4.) As a result, there are many "Chord N = play Mode X,Y or Z" type formulas, often seen by beginners as an easy answer to navigating chord progressions.
5.) Some feel that such formulas can lead to "playing scales" instead of music, and are not as useful as understanding harmony and using your ear.
6.) As a result, beginners are encouraged to learn Intervals*, Arepggios*, Chord Tones*, Harmonizing Scales*, and other fundamental things before Modes.
7.) because full understanding of Modes requires full undertanding of the above fundamentals, some argue that Modes themselves are fundamental.
9.) The 3 biggest "contoversies" over Modes that tend to erupt on TalkBass:
A.) Which is "correct" or "best" way to explain /understand Modes: relative or paralell?
B.) Are Modes the "correct" or "best" way to determine what notes to play for a given chord progression?
C.) Nit-picking poorly worded/ misunderstood explanations or examples.
10.) If it you like how it sounds, none of the above matters.
*If you don't understand what these terms mean, STOP WORRYING ABOUT MODES and learn those first.