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Originally Posted by oilywrag Hi guys,
Still to many ?'s left to ask so I will start here.Coming from a musical background of I,iV,V, and only now learning of ii,V,I progression in jazz,also understanding how to get to iii,ii.V,I.Also about V,I cadances.Where do altered chords fit in and chord subs, also modulating to another key is still a grey area.My basic theory only taught me about using the V7 to change key.Hope the questions make sense.
Cheers Tom  |
Hey Tom...I'll try and keep less is more going... Music has typ. physical principals, the more you are aware of these, the more things make since. Check out Acoustics of music, W.T.Bartholomew, The physics of music, J.M. Bowsher or any accepted book on the subject, or not and do the best you can. You learn all this an usually forget it anyway...
Any one note can be at rest, unless something was, is or will be implied or applied. Intervals, the distance between notes, have physical tendencies. The more unstable, (dissonance) or more stable, (Consonance) the intervals are, make up the foundation of harmonic music. Key of C; G7 going to Cmaj is example of dissonant interval in G7, the interval between B and F, ( tri-tone) resolving to C and E of Cmaj. It goes on and when your done it's still subjective and you determine what your ear likes or believes to be the best choice.
Dominant Cadence is resolution of tri-tone of key; G7 to Cmaj in key of C. V-I
Dominant Resolution is resolution of a tri-tone to other chord than I; D7 to G7 in key of C, In jazz we call these secondary dominant, ( usually refers to resolution chord being diatonic).
Substitute Dominant is a Dom7th chord built from the tri-tone being inharmonically spelled(turned upside down) from a different dom7th chord: B to F in G7 becomes F to B in Db7, Db7 is the Sub-Dom or subV of C. bII7 / I.
Altered V chords come from V chords constructed from Harmonic and molodic minors. Sometimes its easier to think of scales in minor. Key of C; A min. , usually called Natural Minor; A,B,C,D,E,F,G.A, Harmonic minor;A,B,C,D,E,F,G#,A, Molodic Minor; A,B,C,D,E,F#,G#,A.
The V chord from Harmonic is; E7b9b13. nat.11
The V chord from Molodic is; E7b13, nat.9 and 11
also from Molodic is the IV7 chord or D7#11 nat. 9 & 13. called Lydianb7
* V7alt refers to chord built on 7th degree of molodic min. G#7with b9	 b5,b13. ( usually use only one alt 9th). * actual notes come from adding chromatic alterations between V7 resolving to Imaj7 and arranging alterations and chord tones into a chord scale. Don't know what came first, but I would think was played first, and explained 2nd.
The D7#11 and the G#7alt. chords are interchangeable, same set of notes and used like that in jazz, both comping and soloing. I would take it one step at a time and enjoy playing. Hard to keep it short... Reg