An essential learning tool in any guitarist’s case! This chord tool helps you learn positions for each finger on the fretboard and offers chord substitutions for songwriting. The key references are also a great way to come up with a base for solos! This guitar theory circle contains 72 most commonly used chord diagrams in 12 keys. Dial the round disc and you can effortlessly find the chord fingering diagram in each key and its corresponding scale degree. Specifications: Wheel Material: Aluminum Alloy Wheel Diameter: 12 cm / 4.72 inch Base Material: Solid Beech There are 36 seventh chord fingerings on the back of the melody tool wheel, which are major seventh chords, minor seventh chords, and dominant seventh chords, making the chords colorful. The front contains major triads, minor triads, and half-diminished seventh chords. Each of these types uses different intervals between the notes in the chord, which gives it a different sound and feel. What Is A Seventh Chord And Triad Chord? A seventh chord is a type of chord that is built by taking a triad chord and adding an additional note: the 7th note of the scale. For example, if we took a C major triad and added the seventh note of C major scale (B), we would then be playing a C major 7 chord. Major 7th chords Major 7th chords are built by taking the major triad and adding a 4th note, which is a major 7th interval about the root note. A C major 7th chord would use the notes C, E, G, and B. Minor 7th Chords Another type of 7th chord that is very common is a minor 7th chord. Instead of using a major triad, these are built using a minor triad with a minor 7th interval. In C this would be C, Eb, G, and Bb. Dominant 7th chords A dominant 7th chord comes from the mixolydian mode, which is also known as the dominant scale as it’s built on the 5th degree of the scale (called the dominant). A dominant 7th chord is built by taking the major triad and adding a 4th note, which is a minor 7th interval about the root note. In C, this would be C, E, G, and Bb. Half Diminished 7th Chords Half diminished chords come from the Locrian mode, which is the 7th mode of the major scale. These are built by combining a diminished triad chord with a minor 7th interval, which in C would be C, Eb, Gb, and Bb. Triad Chord: A type of chord consisting of three notes: A root, 3rd, and 5th the root – the note on which the triad is built ( I )the third – an interval of a third above the root ( III )the fifth – an interval of a 5th above the root ( V ) A major triad has a major 3rd (between root and 3rd) followed by a minor 3rd (between 3rd and 5th). A minor triad is the reverse – it has a minor 3rd (between root and 3rd) followed by a major 3rd (between 3rd and 5th). There are 7 semitones between the bottom and top notes in both major and minor triads. The change is in the interval between the bottom (root) and middle (3rd) notes. In the major triad there are 4 semitones between C and E – 4 semitones equals a major 3rd (hence the happy sound in a C major triad) In the minor triad there are only 3 semitones between the A and C – 3 semitones equals a minor 3rd (hence the sadness sound in a minor triad) After using our guitar learning tool for a long time, you can grasp the chord theory, build the chords and play the beautiful songs Applications Suitable for individuals at all skill levels, from beginners to professional music enthusiasts. After practicing fingering and chord theory for a long time, you will discover patterns, easily change keys, chord progressions, write songs