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Although changing the octave of certain notes in a chord (within reason) does change the way the chord sounds, it does not change the essential characteristics or tendency of it. Accordingly, using the ninth, eleventh, or thirteenth in chord notation implies that the chord is an extended tertian chord rather than an added chord.
In a musical composition, a chord progression or harmonic progression (informally chord changes, used as a plural) is a succession of chords.Chord progressions are the foundation of harmony in Western musical tradition from the common practice era of Classical music to the 21st century.
The usual minor chord with 6/5 is the upminor chord. It's spelled as C–^E ♭ –G and named as C^m. Compare with ^Cm (^C–^E ♭ –^G). Likewise the usual major chord with 5/4 is actually a downmajor chord. It's spelled as C–vE–G and named as Cv. Porcupine Notation significantly changes chord spellings (e.g. the major triad is now C ...
In these genres, chord-playing musicians in the rhythm section (e.g., electric guitar, acoustic guitar, piano, Hammond organ, etc.) typically improvise the specific "voicing" of each chord from a song's chord progression by interpreting the written chord symbols appearing in the lead sheet or fake book. Normally, these chord symbols include:
The numbers do not change when transposing the composition into another key. They are relative to the new Tonic. The only required knowledge is the major scale for the given key. Unless otherwise noted, all numbers represent major chords, and each chord should be played for one measure. So in the key of C, the Nashville Number System notation:
Simpler chord charts for songs may contain only the chord changes, placed above the lyrics where they occur. Such charts depend on prior knowledge of the melody, and are used as reminders in performance or informal group singing. Some chord charts intended for rhythm section accompanists contain only the chord progression.
These chords are all borrowed from the key of E minor. Similarly, in minor keys, chords from the parallel major may also be "borrowed". For example, in E minor, the diatonic chord built on the fourth scale degree is IVm, or A minor. However, in practice, many songs in E minor will use IV (A major), which is borrowed from the key of E major.
The four basic chord types are major, minor, minor-major, and dominant. When written in a jazz chart, these chords may have alterations specified in parentheses after the chord symbol. An altered note is a note which is a deviation from the canonical chord tone. [citation needed] There is variety in the chord symbols used in jazz notation.