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153 relations: Accidental (music), Added tone chord, Atonality, Augmentation (music), Augmented fifth, Augmented octave, Augmented second, Augmented seventh, Augmented seventh chord, Augmented sixth, Augmented third, Augmented triad, Augmented unison, Bijection, Bohlen–Pierce scale, Cent (music), Chord (music), Chromatic scale, Circle of fifths, Comma (music), Common practice period, Consonance and dissonance, Counterpoint, David Cope, David Lewin, Degree (music), Diaschisma, Diatonic and chromatic, Diatonic function, Diatonic scale, Diatonic set theory, Diesis, Diminished fourth, Diminished octave, Diminished second, Diminished seventh, Diminished seventh chord, Diminished sixth, Diminished third, Diminished triad, Diminution, Ditone, Dominant (music), Dominant seventh chord, Dyad (music), Ear training, Eleventh, Emphasis (typography), Enharmonic, Equal temperament, ..., Fifteenth, Five-limit tuning, Frequency, Generic and specific intervals, George Perle, Hal Leonard Corporation, Half-diminished seventh chord, Harmonic series (music), Harmonic seventh, Harmony, Heptatonic scale, Hermann von Helmholtz, Indian classical music, Integer, Interval (music), Interval class, Interval cycle, Interval ratio, Inversion (music), Johannes Tinctoris, John Tyrrell (musicologist), Just intonation, Key signature, Kleisma, Latin, Lipps–Meyer law, List of meantone intervals, List of pitch intervals, Logarithm, Logarithmic scale, Major and minor, Major chord, Major scale, Major second, Major seventh, Major seventh chord, Major sixth, Major third, Meantone temperament, Melodic motion, Melody, Microtonal music, Minor chord, Minor major seventh chord, Minor scale, Minor seventh, Minor seventh chord, Minor sixth, Minor third, Mode (statistics), Music and mathematics, Music theory, Musical instrument, Musical keyboard, Musical note, Musical tuning, Natural (music), Ninth, Octave, Ottó Károlyi, Overtone, Paul Hindemith, Perfect fifth, Perfect fourth, Pitch (music), Pitch class, Pitch interval, Pitch space, Power chord, Pseudo-octave, Pythagorean comma, Pythagorean tuning, Quarter tone, Quarter-comma meantone, Ratio, Regular temperament, Renaissance music, Root (chord), Rounding, Schisma, Semitone, Septimal comma, Septimal kleisma, Serialism, Set theory (music), Shruti (music), Sixth chord, Staff (music), Stanley Sadie, Superparticular ratio, Symmetry, Syntonic comma, Third (chord), Thirteenth, Timbre, Time point, Transposition (music), Triad (music), Tritone, Twelve-tone technique, Unison, Western culture, Wolf interval. Expand index (103 more) »
Accidental (music)
In music, an accidental is a note of a pitch (or pitch class) that is not a member of the scale or mode indicated by the most recently applied key signature.
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Added tone chord
An added tone chord is a non-tertian chord composed of a tertian triad and an extra "added" note.
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Atonality
Atonality in its broadest sense is music that lacks a tonal center, or key.
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Augmentation (music)
In Western music and music theory, augmentation (from Late Latin augmentare, to increase) is the lengthening of a note or interval.
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Augmented fifth
In classical music from Western culture, an augmented fifth is an interval produced by widening a perfect fifth by a chromatic semitone.
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Augmented octave
In modern Western tonal music theory an augmented octave is the sum of a perfect octave and an augmented unison or chromatic semitone.
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Augmented second
In classical music from Western culture, an augmented second is an interval that, in equal temperament, is sonically equivalent to a minor third, spanning three semitones, and is created by widening a major second by a chromatic semitone.
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Augmented seventh
In classical music from Western culture, an augmented seventh is an interval produced by widening a major seventh by a chromatic semitone.
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Augmented seventh chord
The augmented seventh chord, or seventh augmented fifth chord, or seventh sharp five chord is a dominant seventh chord consisting of an augmented triad with a minor seventh.
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Augmented sixth
In classical music from Western culture, an augmented sixth is an interval produced by widening a major sixth by a chromatic semitone.
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Augmented third
In classical music from Western culture, an augmented third is an interval of five semitones.
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Augmented triad
An augmented triad is a chord, made up of two major thirds (an augmented fifth).
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Augmented unison
In modern Western tonal music theory an augmented unison or augmented prime is the interval between two notes on the same staff position, or denoted by the same note letter, whose alterations cause them, in ordinary equal temperament, to be one semitone apart.
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Bijection
In mathematics, a bijection, bijective function, or one-to-one correspondence is a function between the elements of two sets, where each element of one set is paired with exactly one element of the other set, and each element of the other set is paired with exactly one element of the first set.
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Bohlen–Pierce scale
The Bohlen–Pierce scale (BP scale) is a musical tuning and scale, first described in the 1970s, that offers an alternative to the octave-repeating scales typical in Western and other musics, specifically the equal tempered diatonic scale.
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Cent (music)
The cent is a logarithmic unit of measure used for musical intervals.
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Chord (music)
A chord, in music, is any harmonic set of pitches consisting of two or more (usually three or more) notes (also called "pitches") that are heard as if sounding simultaneously.
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Chromatic scale
The chromatic scale is a musical scale with twelve pitches, each a semitone above or below its adjacent pitches.
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Circle of fifths
In music theory, the circle of fifths (or circle of fourths) is the relationship among the 12 tones of the chromatic scale, their corresponding key signatures, and the associated major and minor keys.
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Comma (music)
In music theory, a comma is a minute interval, the difference resulting from tuning one note two different ways.
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Common practice period
In the history of European art music, the common practice period is the era between the formation and the decline of the tonal system.
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Consonance and dissonance
In music, consonance and dissonance are categorizations of simultaneous or successive sounds.
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Counterpoint
In music, counterpoint is the relationship between voices that are harmonically interdependent (polyphony) yet independent in rhythm and contour.
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David Cope
David Cope (born May 17, 1941 in San Francisco, California) is an American author, composer, scientist, and former professor of music at the University of California, Santa Cruz.
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David Lewin
David Benjamin Lewin (July 2, 1933 – May 5, 2003) was an American music theorist, music critic and composer.
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Degree (music)
In music theory, scale degree refers to the position of a particular note on a scale relative to the tonic, the first and main note of the scale from which each octave is assumed to begin.
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Diaschisma
The diaschisma (or diacisma) is a small musical interval defined as the difference between three octaves and four perfect fifths plus two major thirds (in just intonation).
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Diatonic and chromatic
Diatonic (διατονική) and chromatic (χρωματική) are terms in music theory that are most often used to characterize scales, and are also applied to musical instruments, intervals, chords, notes, musical styles, and kinds of harmony.
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Diatonic function
In tonal music theory, a function (often called harmonic function, tonal function or diatonic function, or also chord area) is the relationship of a chord to a tonal center.
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Diatonic scale
In western music theory, a diatonic scale is a heptatonic scale that includes five whole steps (whole tones) and two half steps (semitones) in each octave, in which the two half steps are separated from each other by either two or three whole steps, depending on their position in the scale.
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Diatonic set theory
Diatonic set theory is a subdivision or application of musical set theory which applies the techniques and insights of discrete mathematics to properties of the diatonic collection such as maximal evenness, Myhill's property, well formedness, the deep scale property, cardinality equals variety, and structure implies multiplicity.
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Diesis
In classical music from Western culture, a diesis ("difference"; Greek: δίεσις "leak" or "escape"Benson, Dave (2006). Music: A Mathematical Offering, p.171.. Based on the technique of playing the aulos, where pitch is raised a small amount by slightly raising the finger on the lowest closed hole, letting a small amount of air "escape".) is either an accidental (see sharp), or a very small musical interval, usually defined as the difference between an octave (in the ratio 2:1) and three justly tuned major thirds (tuned in the ratio 5:4), equal to 128:125 or about 41.06 cents.
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Diminished fourth
In classical music from Western culture, a diminished fourth is an interval produced by narrowing a perfect fourth by a chromatic semitone.
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Diminished octave
In classical music from Western culture, a diminished octave is an interval produced by narrowing a perfect octave by a chromatic semitone.
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Diminished second
In modern Western tonal music theory, a diminished second is the interval produced by narrowing a minor second by one chromatic semitone.
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Diminished seventh
In classical music from Western culture, a diminished seventh is an interval produced by narrowing a minor seventh by a chromatic semitone.
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Diminished seventh chord
The diminished seventh chord is commonly used in the harmony of both Western classical music and also in jazz and popular music of the twentieth and twenty-first centuries.
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Diminished sixth
In classical music from Western culture, a diminished sixth is an interval produced by narrowing a minor sixth by a chromatic semitone.
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Diminished third
In classical music from Western culture, a diminished third is the musical interval produced by narrowing a minor third by a chromatic semitone.
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Diminished triad
In music, a diminished triad, also known as the minor flatted fifth (m5), is a triad consisting 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.
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Diminution
In Western music and music theory, diminution (from Medieval Latin diminutio, alteration of Latin deminutio, decrease) has four distinct meanings.
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Ditone
In music, a ditone (from, "of two tones") is the interval of a major third.
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Dominant (music)
In music, the dominant is the fifth scale degree of the diatonic scale, called "dominant" because it is next in importance to the tonic, and a dominant chord is any chord built upon that pitch, using the notes of the same diatonic scale.
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Dominant seventh chord
In music theory, a dominant seventh chord, or major minor seventh chord, is a chord composed of a root, major third, perfect fifth, and minor seventh.
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Dyad (music)
In music, a dyad (less commonly, doad) is a set of two notes or pitches that, in particular contexts, may imply a chord.
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Ear training
Ear training or aural skills is a skill by which musicians learn to identify, solely by hearing, pitches, intervals, melody, chords, rhythms, and other basic elements of music.
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Eleventh
In music or music theory an eleventh is the note eleven scale degrees from the root of a chord and also the interval between the root and the eleventh.
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Emphasis (typography)
In typography, emphasis is the strengthening of words in a text with a font in a different style from the rest of the text, to highlight them.
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Enharmonic
In modern musical notation and tuning, an enharmonic equivalent is a note, interval, or key signature that is equivalent to some other note, interval, or key signature but "spelled", or named differently.
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Equal temperament
An equal temperament is a musical temperament, or a system of tuning, in which the frequency interval between every pair of adjacent notes has the same ratio.
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Fifteenth
In music, a fifteenth or double octave, abbreviated 15ma, is the interval between one musical note and another with one-quarter the wavelength or quadruple the frequency.
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Five-limit tuning
Five-limit tuning, 5-limit tuning, or 5-prime-limit tuning (not to be confused with 5-odd-limit tuning), is any system for tuning a musical instrument that obtains the frequency of each note by multiplying the frequency of a given reference note (the base note) by products of integer powers of 2, 3, or 5 (prime numbers limited to 5 or lower), such as.
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Frequency
Frequency is the number of occurrences of a repeating event per unit of time.
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Generic and specific intervals
In diatonic set theory a generic interval is the number of scale steps between notes of a collection or scale.
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George Perle
George Perle (May 6, 1915 – January 23, 2009) was a composer and music theorist.
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Hal Leonard Corporation
Hal Leonard Corporation is a United States music publishing and distribution company founded in Winona, Minnesota, by Harold "Hal" Edstrom, his brother, Everett "Leonard" Edstrom, and fellow musician Roger Busdicker.
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Half-diminished seventh chord
In music theory, the half-diminished seventh chord—also known as a half-diminished chord or a minor seventh flat five (m75)—is formed by a root note, a minor third, a diminished fifth, and a flat seventh.
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Harmonic series (music)
A harmonic series is the sequence of sounds—pure tones, represented by sinusoidal waves—in which the frequency of each sound is an integer multiple of the fundamental, the lowest frequency.
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Harmonic seventh
The harmonic seventh interval, also known as the septimal minor seventh, or subminor seventh, is one with an exact 7:4 ratioAndrew Horner, Lydia Ayres (2002).
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Harmony
In music, harmony considers the process by which the composition of individual sounds, or superpositions of sounds, is analysed by hearing.
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Heptatonic scale
A heptatonic scale is a musical scale that has seven pitches per octave.
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Hermann von Helmholtz
Hermann Ludwig Ferdinand von Helmholtz (August 31, 1821 – September 8, 1894) was a German physician and physicist who made significant contributions in several scientific fields.
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Indian classical music
Indian classical music is a genre of South Asian music.
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Integer
An integer (from the Latin ''integer'' meaning "whole")Integer 's first literal meaning in Latin is "untouched", from in ("not") plus tangere ("to touch").
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Interval (music)
In music theory, an interval is the difference between two pitches.
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Interval class
In musical set theory, an interval class (often abbreviated: ic), also known as unordered pitch-class interval, interval distance, undirected interval, or "(even completely incorrectly) as 'interval mod 6'", is the shortest distance in pitch class space between two unordered pitch classes.
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Interval cycle
In music, an interval cycle is a collection of pitch classes created from a sequence of the same interval class.
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Interval ratio
In music, an interval ratio is a ratio of the frequencies of the pitches in a musical interval.
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Inversion (music)
There are inverted chords, inverted melodies, inverted intervals, and (in counterpoint) inverted voices.
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Johannes Tinctoris
Jehan le Taintenier or Jean Teinturier, Latinised in Johannes Tinctoris (aka Jean de Vaerwere) (c. 1435 – 1511) was a Renaissance composer and music theorist from the Low Countries.
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John Tyrrell (musicologist)
John Tyrrell (born 1942) is a British musicologist.
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Just intonation
In music, just intonation (sometimes abbreviated as JI) or pure intonation is any musical tuning in which the frequencies of notes are related by ratios of small whole numbers.
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Key signature
In musical notation, a key signature is a set of sharp, flat, and rarely, natural symbols placed together on the staff.
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Kleisma
In music theory and tuning, the kleisma (κλεισμα), or semicomma majeur, is a minute and barely perceptible comma type interval important to musical temperaments.
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Latin
Latin (Latin: lingua latīna) is a classical language belonging to the Italic branch of the Indo-European languages.
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Lipps–Meyer law
The Lipps–Meyer law, named for Theodor Lipps (1851–1914) and Max Friedrich Meyer (1873–1967), hypothesizes that the closure of melodic intervals is determined by "whether or not the end tone of the interval can be represented by the number two or a power of two", in the frequency ratio between notes (see octave).
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List of meantone intervals
The following is a list of intervals of extended meantone temperament.
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List of pitch intervals
Below is a list of intervals expressible in terms of a prime limit (see Terminology), completed by a choice of intervals in various equal subdivisions of the octave or of other intervals.
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Logarithm
In mathematics, the logarithm is the inverse function to exponentiation.
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Logarithmic scale
A logarithmic scale is a nonlinear scale used when there is a large range of quantities.
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Major and minor
In Western music, the adjectives major and minor can describe a musical composition, movement, section, scale, key, chord, or interval.
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Major chord
In music theory, a major chord is a chord that has a root note, a major third above this root, and a perfect fifth above this root note.
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Major scale
The major scale (or Ionian scale) is one of the most commonly used musical scales, especially in Western music.
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Major second
In Western music theory, a major second (sometimes also called whole tone) is a second spanning two semitones.
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Major seventh
In classical music from Western culture, a seventh is a musical interval encompassing seven staff positions (see Interval number for more details), and the major seventh is one of two commonly occurring sevenths.
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Major seventh chord
In music, a major seventh chord is a seventh chord where the "third" note is a major third above the root, and the "seventh" note is a major seventh above the root (a fifth above the third note).
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Major sixth
In music from Western culture, a sixth is a musical interval encompassing six note letter names or staff positions (see Interval number for more details), and the major sixth is one of two commonly occurring sixths.
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Major third
In classical music from Western culture, a third is a musical interval encompassing three staff positions (see Interval number for more details), and the major third is a third spanning four semitones.
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Meantone temperament
Meantone temperament is a musical temperament, that is a tuning system, obtained by slightly compromising the fifths in order to improve the thirds.
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Melodic motion
Melodic motion is the quality of movement of a melody, including nearness or farness of successive pitches or notes in a melody.
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Melody
A melody (from Greek μελῳδία, melōidía, "singing, chanting"), also tune, voice, or line, is a linear succession of musical tones that the listener perceives as a single entity.
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Microtonal music
Microtonal music or microtonality is the use in music of microtones—intervals smaller than a semitone, also called "microintervals".
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Minor chord
In music theory, a minor chord is a chord having a root, a minor third, and a perfect fifth.
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Minor major seventh chord
A minor major seventh chord, or minor/major seventh chord (written as mM7, mΔ7, −Δ7, mM7, m/M7, m(M7), minmaj7, m⑦,m7, m7+, etc.), is a naturally occurring diatonic nondominant seventh chord in the harmonic minor scale.
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Minor scale
In music theory, the term minor scale refers to three scale formations – the natural minor scale (or Aeolian mode), the harmonic minor scale, and the melodic minor scale (ascending or descending) – rather than just one as with the major scale.
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Minor seventh
In music theory, a minor seventh is one of two musical intervals that span seven staff positions.
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Minor seventh chord
In music, a minor seventh chord is any nondominant seventh chord where the "third" note is a minor third above the root.
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Minor sixth
In classical music from Western culture, a sixth is a musical interval encompassing six staff positions (see Interval number for more details), and the minor sixth is one of two commonly occurring sixths.
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Minor third
In the music theory of Western culture, a minor third is a musical interval that encompasses three half steps, or semitones.
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Mode (statistics)
The mode of a set of data values is the value that appears most often.
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Music and mathematics
Music theory has no axiomatic foundation in modern mathematics, yet the basis of musical sound can be described mathematically (in acoustics) and exhibits "a remarkable array of number properties".
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Music theory
Music theory is the study of the practices and possibilities of music.
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Musical instrument
A musical instrument is an instrument created or adapted to make musical sounds.
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Musical keyboard
A musical keyboard is the set of adjacent depressible levers or keys on a musical instrument.
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Musical note
In music, a note is the pitch and duration of a sound, and also its representation in musical notation (♪, ♩).
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Musical tuning
In music, there are two common meanings for tuning.
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Natural (music)
In music theory, a natural is an accidental which cancels previous accidentals and represents the unaltered pitch of a note.
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Ninth
second | abbreviation.
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Octave
In music, an octave (octavus: eighth) or perfect octave is the interval between one musical pitch and another with half or double its frequency.
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Ottó Károlyi
Ottó Károlyi (born in Paris), having studied in Budapest, Vienna, and London, was a musicologist and the Senior Lecturer of Music at the University of Stirling, Scotland, where he founded the Music department and remained employed even after the department's closure.
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Overtone
An overtone is any frequency greater than the fundamental frequency of a sound.
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Paul Hindemith
Paul Hindemith (16 November 1895 – 28 December 1963) was a prolific German composer, violist, violinist, teacher and conductor.
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Perfect fifth
In music theory, a perfect fifth is the musical interval corresponding to a pair of pitches with a frequency ratio of 3:2, or very nearly so.
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Perfect fourth
In classical music from Western culture, a fourth spans exactly four letter names (staff positions), while a perfect fourth (harmonic series) always involves the same interval, regardless of key (sharps and flats) between letters. A perfect fourth is the relationship between the third and fourth harmonics, sounding neither major nor minor, but consonant with an unstable quality (additive synthesis). In the key of C, the notes C and F constitute a perfect fourth relationship, as they're separated by four semitones (C, C#, D, D#, E, F). Up until the late 19th century, the perfect fourth was often called by its Greek name, diatessaron. A perfect fourth in just intonation corresponds to a pitch ratio of 4:3, or about 498 cents, while in equal temperament a perfect fourth is equal to five semitones, or 500 cents. The perfect fourth is a perfect interval like the unison, octave, and perfect fifth, and it is a sensory consonance. In common practice harmony, however, it is considered a stylistic dissonance in certain contexts, namely in two-voice textures and whenever it appears above the bass. If the bass note also happens to be the chord's root, the interval's upper note almost always temporarily displaces the third of any chord, and, in the terminology used in popular music, is then called a suspended fourth. Conventionally, adjacent strings of the double bass and of the bass guitar are a perfect fourth apart when unstopped, as are all pairs but one of adjacent guitar strings under standard guitar tuning. Sets of tom-tom drums are also commonly tuned in perfect fourths. The 4:3 just perfect fourth arises in the C major scale between G and C.
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Pitch (music)
Pitch is a perceptual property of sounds that allows their ordering on a frequency-related scale, or more commonly, pitch is the quality that makes it possible to judge sounds as "higher" and "lower" in the sense associated with musical melodies.
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Pitch class
In music, a pitch class (p.c. or pc) is a set of all pitches that are a whole number of octaves apart, e.g., the pitch class C consists of the Cs in all octaves.
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Pitch interval
In musical set theory, a pitch interval (PI or ip) is the number of semitones that separates one pitch from another, upward or downward.
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Pitch space
In music theory, pitch spaces model relationships between pitches.
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Power chord
In guitar music, especially electric guitar, a power chord (also fifth chord) is a colloquial name for a chord that consists of the root note and the fifth.
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Pseudo-octave
A pseudo-octave, pseudooctave,"Interview with Max Mathews", p.21.
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Pythagorean comma
In musical tuning, the Pythagorean comma (or ditonic comma), named after the ancient mathematician and philosopher Pythagoras, is the small interval (or comma) existing in Pythagorean tuning between two enharmonically equivalent notes such as C and B, or D and C. It is equal to the frequency ratio (1.5)12/128.
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Pythagorean tuning
Pythagorean tuning is a system of musical tuning in which the frequency ratios of all intervals are based on the ratio 3:2.
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Quarter tone
A quarter tone is a pitch halfway between the usual notes of a chromatic scale or an interval about half as wide (aurally, or logarithmically) as a semitone, which itself is half a whole tone.
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Quarter-comma meantone
Quarter-comma meantone, or -comma meantone, was the most common meantone temperament in the sixteenth and seventeenth centuries, and was sometimes used later.
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Ratio
In mathematics, a ratio is a relationship between two numbers indicating how many times the first number contains the second.
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Regular temperament
Regular temperament is any tempered system of musical tuning such that each frequency ratio is obtainable as a product of powers of a finite number of generators, or generating frequency ratios.
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Renaissance music
Renaissance music is vocal and instrumental music written and performed in Europe during the Renaissance era.
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Root (chord)
In music theory, the concept of root is the idea that a chord can be represented and named by one of its notes.
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Rounding
Rounding a numerical value means replacing it by another value that is approximately equal but has a shorter, simpler, or more explicit representation; for example, replacing $ with $, or the fraction 312/937 with 1/3, or the expression with.
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Schisma
In music, the schisma (also spelled skhisma) is the interval between a Pythagorean comma (531441:524288) and a syntonic comma (81:80) and equals 32805:32768, which is 1.9537 cents.
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Semitone
A semitone, also called a half step or a half tone, is the smallest musical interval commonly used in Western tonal music, and it is considered the most dissonant when sounded harmonically.
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Septimal comma
A septimal comma is a small musical interval in just intonation that contains the number seven in its prime factorization.
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Septimal kleisma
In music, the ratio 225/224 is called the septimal kleisma.
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Serialism
In music, serialism is a method of composition using series of pitches, rhythms, dynamics, timbres or other musical elements.
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Set theory (music)
Musical set theory provides concepts for categorizing musical objects and describing their relationships.
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Shruti (music)
Shruti or śruti, is a Sanskrit word, found in the Vedic texts of Hinduism where it means lyrics and "what is heard" in general.
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Sixth chord
The term sixth chord refers to two different kinds of chord, the first in classical music and the second in modern popular music.
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Staff (music)
In Western musical notation, the staff (US) or stave (UK) (plural for either: '''staves''') is a set of five horizontal lines and four spaces that each represent a different musical pitch or, in the case of a percussion staff, different percussion instruments.
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Stanley Sadie
Stanley John Sadie, CBE (30 October 1930 – 21 March 2005) was an influential and prolific British musicologist, music critic, and editor.
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Superparticular ratio
In mathematics, a superparticular ratio, also called a superparticular number or epimoric ratio, is the ratio of two consecutive integer numbers.
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Symmetry
Symmetry (from Greek συμμετρία symmetria "agreement in dimensions, due proportion, arrangement") in everyday language refers to a sense of harmonious and beautiful proportion and balance.
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Syntonic comma
In music theory, the syntonic comma, also known as the chromatic diesis, the comma of Didymus, the Ptolemaic comma, or the diatonic comma is a small comma type interval between two musical notes, equal to the frequency ratio 81:80 (.
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Third (chord)
In music, the third factor of a chord is the note or pitch two scale degrees above the root or tonal center.
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Thirteenth
In music or music theory, a thirteenth is the interval between the sixth and first scale degrees when the sixth is transposed up an octave, creating a compound sixth, or thirteenth.
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Timbre
In music, timbre (also known as tone color or tone quality from psychoacoustics) is the perceived sound quality of a musical note, sound or tone.
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Time point
In music a time point or timepoint (point in time) is "an instant, analogous to a geometrical point in space".
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Transposition (music)
In music transposition refers to the process, or operation, of moving a collection of notes (pitches or pitch classes) up or down in pitch by a constant interval.
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Triad (music)
In music, a triad is a set of three notes (or "pitches") that can be stacked vertically in thirds.
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Tritone
In music theory, the tritone is defined as a musical interval composed of three adjacent whole tones.
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Twelve-tone technique
Twelve-tone technique—also known as dodecaphony, twelve-tone serialism, and (in British usage) twelve-note composition—is a method of musical composition devised by Austrian composer Arnold Schoenberg (1874–1951) and associated with the "Second Viennese School" composers, who were the primary users of the technique in the first decades of its existence.
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Unison
In music, unison is two or more musical parts sounding the same pitch or at an octave interval, usually at the same time.
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Western culture
Western culture, sometimes equated with Western civilization, Occidental culture, the Western world, Western society, European civilization,is a term used very broadly to refer to a heritage of social norms, ethical values, traditional customs, belief systems, political systems and specific artifacts and technologies that have some origin or association with Europe.
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Wolf interval
In music theory, the wolf fifth (sometimes also called Procrustean fifth, or imperfect fifth) Paul, Oscar (1885).
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References
[1] https://en.wikipedia.org/wiki/Interval_(music)
