Bass (chord)

music theory Music theory is the study of the practices and possibilities of music. ''The Oxford Companion to Music'' describes three interrelated uses of the term "music theory". The first is the "rudiments", that are needed to understand music notation (ke ...

, the bass note of a chord or sonority is the lowest

note Note, notes, or NOTE may refer to: Music and entertainment * Musical note, a pitched sound (or a symbol for a sound) in music * ''Notes'' (album), a 1987 album by Paul Bley and Paul Motian * ''Notes'', a common (yet unofficial) shortened version ...

played or notated. If there are multiple voices it is the note played or notated in the lowest voice (the note furthest in the bass.) Three situations are possible: # The bass note is the

root In vascular plants, the roots are the organs of a plant that are modified to provide anchorage for the plant and take in water and nutrients into the plant body, which allows plants to grow taller and faster. They are most often below the sur ...

or fundamental of the chord. The chord is in

root position The root position of a chord is the voicing of a triad, seventh chord, or ninth chord in which the root of the chord is the bass note and the other chord factors are above it. In the root position, uninverted, of a C-major triad, the bass is C ...

. # One of the other pitches of the chord is in the bass. This makes it an

inverted chord In music theory, an inversion is a type of change to intervals, chords, voices (in counterpoint), and melodies. In each of these cases, "inversion" has a distinct but related meaning. The concept of inversion also plays an important role in mus ...

# The bass note is ''not'' one of the notes in the chord. Such a bass note is an additional note, coloring the chord above it. The name of such a chord is also notated as a

slash chord In music, especially modern popular music, a slash chord or slashed chord, also compound chord, is a chord whose bass note or inversion is indicated by the addition of a slash and the letter of the bass note after the root note letter. It does no ...

. In pre- tonal theory (

Early music Early music generally comprises Medieval music (500–1400) and Renaissance music (1400–1600), but can also include Baroque music (1600–1750). Originating in Europe, early music is a broad musical era for the beginning of Western classical m ...

), root notes were not considered and thus the bass was the most defining note of a sonority. See:

thoroughbass Figured bass is musical notation in which numerals and symbols appear above or below (or next to) a bass note. The numerals and symbols (often accidentals) indicate intervals, chords, and non-chord tones that a musician playing piano, harpsi ...

. In

pandiatonic Pandiatonicism is a musical technique of using the diatonic (as opposed to the chromatic) scale without the limitations of functional tonality. Music using this technique is pandiatonic. History The term "pandiatonicism" was coined by Nicola ...

chords the bass often does not determine the chord, as is always the case with a

nonharmonic bass A nonchord tone (NCT), nonharmonic tone, or embellishing tone is a note in a piece of music or song that is not part of the implied or expressed chord set out by the harmonic framework. In contrast, a chord tone is a note that is a part of the ...

. Bass (sound) Chord factors {{music-theory-stub