Chords and roman numerals.

General chords and chords on bass guitar.


In music, an augmented triad is a triad, or chord, consisting of two major thirds (an augmented fifth). The term augmented triad arises from anaugmented triad being considered a major chordwhose top note (fifth) is raised, or augmented. It can be represented by the integer notation {0, 4, 8}.


In music, a diminished triad ( Play (help. · info)), also known as the minor flatted fifth (m^♭5), is a triadconsisting of two minor thirds above the root — if built on C, a diminished triad would have a C, an E♭ and a G♭. It resembles a minor triad with a lowered (flattened) fifth.

In music theory, a major chord ( Play (help. · info)) is achord that has a root note, a major third above this root, and a perfect fifth above this root note. When a chord has these three notes alone, it is called a major triad.

In music theory, a minor chord ( play D minor chord(help. · info)) is a chord having a root, a minor third, and a perfect fifth. When a chord has these three notes alone, it is called a minor triad. Some minortriads with additional notes, such as the minorseventh chord, may also be called minor chords.

The I–V–vi–IV progression is a common chord progression popular across several genres of music. It involves the I, V, vi, and IV chords; for example, in the key of C major, this would be: C–G–Am–F. Uses based on a different starting point but with the same order of chords, include: I–V–vi–IV, C-G-Am-F (optimistic)