this was part of a tutorial i wrote on music theory, part of which was posted on the tranceaddict forums. you can use it for any type of music but because it concerns chord structure and harmonies you'll probably find it most useful for trance. some of the chords here dont even fit well in trance. you never see diminutive chords or large chords in trance because they often sound anti melodic. experiment and see what you come up with. its just straight up basic theory. once you feel you know the rules, feel free to break em and see what you come up with. maybe it'll help someone here...
a scale from C is C, D, E, F, G, A, B
which is 1st, 2nd, 3rd, 4th, 5th, 6th, 7th note from the root note C.
From the root (key) note C, each note is:
D - Major 2nd
E - Major 3rd
F - Perfect 4th
G - Perfect 5th
A - Major 6th
B - Major 7th
C - Perfect Octave
The Major intervals can be made either diminished (down 2 semitones), minor (down 1) or augmented (up 1)
The Perfect ones can only be made diminished (down 1) or augmented (up 1)
this is also known as a C major scale b/c it has no sharps or flats and its recommended you start learning scales and chords from this root note because of this.
you make a chord using a triad of notes. the 1st root note, major 3rd and perfect 5th.
hence. a C chord is C, E, G.
you can extend this by adding extra notes in harmony.
a C6 would be C, E, G and the 6th note of the scale A.
a C7 is annoying because the 7th is flattened.
this is because there are 3 key familes. major, minor and dominant. a Cmaj7 would be C, E, G, B. a Cdom7 aka C7 = C, E, G, Bb
for 9ths, 11ths and 13ths you need to extend the scale because these chords span 2 octaves.
C, D, E, F, G, A, B,, C, D, E, F, G, A, B,
thats 14 notes.
therefore.
C9 = 1st, 3rd, 5th, 7th (careful), 9th
i.e. C, E, G, Bb, D
C11 = C, E, G, Bb, D, F
and C13 = C, E, G, Bb, D, A
remember we are still working in C dominant. for C major the Bb would be a B. as a general rule concerning the bigger chords, you can leave out some of the notes in the C9, C11 and C13 for example as long as you keep the root and 5th. this is because playing all 6 notes of a C13 can sometimes sound a bit too cluttered. but then it depends on the sound you want to achieve.
you can simplify a large chord that spans more than 1 octave or use smaller chords that just add an extra note in harmony using add.
eg.
C6add9 is a C6 + 9th note.
i.e.
C6add9 = C, E, G, A + D
C7add13 would be a C7 + 13th note
i.e.
C7add13 = C, E, G, Bb, A
a C9add13 would be a C9 chord (C, E, G, Bb, D) + 13th (A)
yep you guessed it. its the same as a C13 chord. hence sometimes the confusion in music theory. its also why you wont find a C9add13 in a chord library more often than not. there will only be a listing for C13. or sometimes vice versa.
you can do the same for scales starting in anything other than C but remember to count up in whole notes (this will includes using sharps and flats).
to end this chord library shit once and for all you can make chords minor, major, suspended, diminutive by altering the original chord triad. there is no need to look up abstract chords in a chord dictionary and doing so is a waste of time because once you know this stuff you can figure out any chord in your head (but to do it on the fly as you are playing is difficult and requires a quick mind and good mental arithmetic. this is why improvized jazz can in many cases be truly amazing and awe inspiring. you can see how quick witted everyone has to be to keep up with the insane number of key changes).
to make C into a minor chord you flatten the major 3rd.
e.g.
C or C major = C, E, G
C minor = C Eb, G
to suspend a chord you can do it in 2 ways. either by sharpening the major note (sus4) or double flattening it (sus2)
e.g.
Csus4 = C, F, G
Csus2 = C, D, G
to diminish a chord you flatten the 3rd and 5th notes.
e.g.
Cdim = C, Eb, F#
you can chain these with 7ths and 11ths to make bigger chords and so forth so that a Cdim7 would = C, Eb, F#, Bb.
C7sus4 would = C, F, G, Bb
inversions:
an inversion is where you take the root note and put it at the end of a note triad. for example if a C chord is C, E, G then the first inversion would be E, G, C. this chord is sometimes written as E/C.
a second inversion is where you 'invert' the root note *and* the second note of the triad (major 3rd) by moving them to the end of the triad. a second inversion of a C chord would = G, C, E.
use inversions to make ordinary chords a little more interesting. if you listen to gabriel and dresden's imagination, which is just an acoustic guitar and vocal peice, alot of the chords in that are inversions of pretty basic guitar chords. i have transcribed that song pretty accurately if there are any guitarists here. just PM me if ya want it.
easy.