UPDATED
Jan 23, 2020
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Core Chords - Creating the Big Six from F7, 1st Voicing
Taking a movable F7 chord, you can derive each of the Big Six essential chords. 7, maj7, m7, m7b5, dim7, and aug7 from that voicing.
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This chord voicing is based off the open position E7 chord transposed to fret (1). How I categorize this 4-part chord for transposition purposes is - _it's a seventh chord with the root on string two_. That and knowing the notes of the ukulele fingerboard will allow you to transpose this chord to ANY key.

Core Chords is a series of UkuleleLessons for building your core 4-part, aka “jazz” chords. These chords commonly called “jazz” chords, are really just 4-part chords that are used in a wide range of musical styles.
These lessons present a highly organized and efficient approach to the mysterious subject of advanced chords. Chord dictionaries are not the answer. Even chord theory does not offer any insight into unraveling the complexity of Ukulele chord voicings.
Building Your Core Chord Foundation
Sometimes called a “Dominant 7th” chord, the 7th chord provides a great foundation for building your core chords.
From the following four 7th chords you can build a set of chords which include: Seventh (7), Major Seventh (maj7), Minor Seventh (m7), Half Diminished Seventh (ø7) or Minor Seven Flat Five (m7b5), Diminished Seventh (°7) and Augmented Seventh (+7). These six chords form a core set of chords.
From four F7 chord voicings or shapes, your can build your massive 4-part, a.k.a., “jazz” chord vocabulary.
Click on any one of the individual F7 chords above to start the lesson for that particular voicing or shape.
Why this F7?
Why this F7? Why not a C7, E7, G7 - the other open position seventh chords that these core chords are based on?
This F7 is based on the E7 and the only one of the E7, C7, A7 and G7 open position chords that the Big Six Core Seventh chords, in their first position, first fret (1) transposable versions are a natural letter chord name. That way you don't have to worry about Enharmonic Equivalents such as C#7/Db7, A#7/Bb7, or G#7/Ab7. An yes I know that there is E# - however that is very rare.
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Learning Core Seventh Chords on `Ukulele
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.
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Core Chords - The Big Six - Building a Solid Chord Foundation • Updated: Jan 23, 2020
The Big Six Core Chords is a series of lessons for building your core, essential 4-part chords. These chords commonly called jazz chords, are really just 4-part chords used in a wide range of musical styles. These chords include: Seventh , Major Seventh, Minor Seventh, Half Diminished Seventh or Minor Seven Flat Five, Diminished Seventh, and Augmented Seventh. These six chords form a core set of chords.

The Big Six Core Chords - F7, four voicings, Chord Intervals • Updated: May 15, 2019
The Big Six Core Chords - Level I: "F7" is created from the "1 3 5 b7" of the major scale, based on the root of the chord. For "F7" the chord tones are: F A C Eb. This lesson introduces the four "F7" voicings on the string set, strings 1, 2. 3, and 4. The Chords are shown for C Tuning, Low and High G.

A Guide to Advanced Ukulele Chords - Volume I
Updated: Feb 13, 2020
Beyond learning basic Ukulele chords most players struggle with advanced chords. Commonly called 'jazz' chords, these more sophisticated voicings find a wide use in all forms of music. A Guide to Advanced Chords for Ukulele - presents a highly organized and efficient approach to the mysterious subject of advanced chords. Chord dictionaries are not the answer.

Exploring Jazz Chords on Ukulele
Updated: Nov 24, 2009
Exploring jazz chords using a variety of common chord progressions based on songs from the standard jazz repertoire. Core Chords are the basic set of chords needed to play a wide range of music, in a variety of styles. This set of chords includes basic open position chords, basic movable form chords and the core 4-part "jazz" chords.

The Advanced Guide to Guitar Chords - Volume I
Updated: Jun 23, 2006
Commonly referred to as jazz chords, this book provides detailed information on voicing 4-part chords. Covers common string families. Beyond learning open and barre chords, most guitarists struggle with advanced chords. Commonly called "Jazz" chords, these more sophisticated voicings find a wide use in all forms of music.

A Guide to Blues Chord Progressions for Ukulele A to Z
Updated: Jun 15, 2006
The Blues are at the heart of all American music. It has influenced Country, Rock, Folk, Jazz, Bluegrass and just about every form of American music we listen to today. 26 blues progression in C and G tuning, progressing from basic to advanced jazz progression, with chord grids and substitutions explained.

A Guide to Blues Chord Progressions for Ukulele A to Z
Updated: Jun 15, 2006
The Blues are at the heart of all American music. It has influenced Country, Rock, Folk, Jazz, Bluegrass and just about every form of American music we listen to today. 26 blues progression in C and G tuning, progressing from basic to advanced jazz progression, with chord grids and substitutions explained.

The Advanced Guide to Chord Progressions for Ukulele - Volume I
Updated: Jan 10, 2020
Before individual chords become the background of songs, they must be put into orders called chord progressions. The Advanced Guide to Chord Progressions for Ukulele organizes progressions according to string family, position, voice leading and chord magnetism.

A Guide to Advanced Ukulele Chords - Volume I
Updated: Feb 13, 2020
Beyond learning basic Ukulele chords most players struggle with advanced chords. Commonly called 'jazz' chords, these more sophisticated voicings find a wide use in all forms of music. A Guide to Advanced Chords for Ukulele - presents a highly organized and efficient approach to the mysterious subject of advanced chords. Chord dictionaries are not the answer.

Exploring Jazz Chords on Ukulele
Updated: Nov 24, 2009
Exploring jazz chords using a variety of common chord progressions based on songs from the standard jazz repertoire. Core Chords are the basic set of chords needed to play a wide range of music, in a variety of styles. This set of chords includes basic open position chords, basic movable form chords and the core 4-part "jazz" chords.
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