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A chord extension or upper partial are the chord tones above the octave and not one of the fundamental 4-part chord tones. These are the ninths, elevenths and thirteenths of chords.
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All chord extensions on ukulele will displace a fundamental chord tone. This is even true for guitar with the ability to add the extension to another string.
C Major Scale Tones to the 13th
The 8, 10 and 12 are NOT used as extensions or upper partials as they are fundamental chord tones and duplicate the 1, 3, and 5 of the chord.
C Major Chord Tones to the 13th
Using Cmaj7 as an Example
From any voicing of a Cmaj7 chord. You can then use the upper partial as a passing tone or just add it to the Cmaj7 creating new Cmaj type chord.
Here are four voicings of Cmaj7 from my book, A Guide to Advance Chords for Ukulele
The top note (string 1) of each chord is heard as the melody note of the chord.
D, F, F# and A can be added to make Cmaj7 a Cmaj9, Cmaj11 (rare), Cmaj7#11 or a Cmaj13 (rare). A 9th can also be added a C6 chord for a 6/9 chord.
Adding the 9th - D
- 0 0 0 2
- 0 0 0 4 Cmaj9
Adding the 11th - F
- 5 7 7 7
- 5 7 7 8 Cmaj11 very rare and typically for major chord types the 11 is an augmented 11 (#11): 5 7 7 9)
Adding the 13th - A
- 9 11 8 10
- 9 11 8 12 (Cmaj13, Another rare chord. Typically C6 is called for).
- 0 0 0 0
- 2 4 3 3
- 5 7 5 7
- 9 9 8 10
Basically add the note not in the original chord to create a new chord voicing.
This is the same principle used to harmonize any melody note. An example is to harmonize a D melody when a Cmaj7 chord is called for. A D melody note and a Cmaj7 chord creates a Cmaj9 chord. Find the Cmaj7 with a C as the highest note on the voicing and move the C note to D. For a modern sound play the voicing with E as the top note and lower the E to D for more contemporary sounding chord.
This principle can be applied to any melody note, not just notes from the scale that the chord came from. Just find the closest chord voicing to the melody note and raise or lower the chord tone on that string to get the correct melody note.
A little theory or a lot of theory depending on where one is in their development goes a long way.
One of the most influential musicians in my development always said "Tools not rules". Learn the principles behind music and it's a liberating moment in your development.
For complete study of 4-part chords and how to create them, ( Blatant self promo coming ), see my Advanced Chord Series of books for Guitar and Ukulele.
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Related Lessons for Upper Partials and Chord Extensions at this time.
A chord substitution is when one chord replaces another chord or is used in addition to a current chord.
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A Guide to Advanced Chords Series - Chord Building Chart
A handle dandy reference chart for building fifteen (15) basic triads and 4-part chords.
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Related Lesson Series
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Core Ukulele Chords - The Big Six
Core Chords for Ukulele, The Big Six - From four F7 chord voicings or shapes, your can build your massive 4-part, a.k.a., “jazz” chord vocabulary. Beyond basic open position chords, basic movable form chords and a core set of 4-part chords. There are just too many chords shapes too memorize. Learning the principles of how chords are constructed and the ukulele fingerboard are the way to go. Then you can create more advanced chords like 9#11, 7#5-9, 13b5, 7+9 on the fly as needed.
The Big Six Core Chords - Level One
The Big Six Core Chords - Level One include: Seventh 7, Major Seventh maj7, Minor Seventh m7, Half Diminished Seventh or Minor Seven Flat Five diminished 7 (m7b5), Diminished Seventh °7 and Augmented Seventh +7. These six chords form a core set of chords.
The Big Six Core Chords - Level Three
The The Big Six Core Chords - Level Three series of chords that build on the Bix Six Core Chords and form the foundation for ALL your jazz chords include: Diminished Major Seventh ( dimL7 ) and Augmented Major Seventh ( augL7 ).
These chords are rare and used to support a major seventh melody.
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