Jazz improvisation

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Jazz improvisation by Col Loughnan (tenor saxophone) at the Manly Jazz Festival with the Sydney Jazz Legends. Loughnan was accompanied by Steve Brien (guitar), Craig Scott (double bass, face obscured), and Ron Lemke (drums).

Jazz improvisation is the spontaneous invention of melodic solo lines or accompaniment parts in a performance of jazz music. It is one of the defining elements of jazz. Improvisation is composing on the spot, when a singer or instrumentalist invents melodies and lines over a chord progression played by rhythm section instruments (piano, guitar, double bass) and accompanied by drums. Although blues, rock, and other genres use improvisation, it is done over relatively simple chord progressions which often remain in one key (or closely related keys using the circle of fifths, such as a song in C Major modulating to G Major).

Contents

Jazz improvisation is distinguished from this approach by chordal complexity, often with one or more chord changes per bar, altered chords, extended chords, tritone substitution, unusual chords (e.g., augmented chords), and extensive use of ii–V–I progression, all of which typically move through multiple keys within a single song. However, since the release of Kind of Blue by Miles Davis, jazz improvisation has come to include modal harmony and improvisation over static key centers, while the emergence of free jazz has led to a variety of types of improvisation, such as "free blowing", in which soloists improvise freely and ignore the chord changes.

Types

Jazz improvisation can be divided into soloing and accompaniment.

Soloing

When soloing, a performer (instrumentalist or singer) creates a new melodic line to fit a song's chord progression. During a solo, the performer who is playing the solo is the main focus of the audience's attention. The other members of the group usually accompany the solo, except for some drum solos or bass solos in which the entire band may stop while the drummer or bassist performs.

When a singer improvises a new melody over chord changes, it is called scat singing. When singers are scat-singing, they typically use made-up syllables ("doo-bie-doo-ba"), rather than use the lyrics of the song. Soloing is often associated with instrumental or vocal virtuosity; while many artists do use advanced techniques in their solos, this is not always done. For example, some 1940s and 1950s-era bass solos consist of the bassist playing a walking bassline.

There are a number of approaches to improvising jazz solos. During the swing era, performers improvised solos by ear by using riffs and variations on the tune's melody. During the bebop era in the 1940s, jazz composers began writing more complex chord progressions. Saxophone player Charlie Parker began soloing using the scales and arpeggios associated with the chords in the chord progression.

Accompaniment

In jazz, when one instrumentalist or singer is doing a solo, the other ensemble members play accompaniment parts. While fully written-out accompaniment parts are used in large jazz ensembles, such as big bands, in small groups (e.g., jazz quartet, piano trio, organ trio, etc.), the rhythm section members typically improvise their accompaniment parts, an activity called comping . In jazz, the instruments in the rhythm section depend on the type of group, but they usually include a bass instrument (double bass, electric bass), one or more instruments capable of playing chords (e.g., piano, electric guitar) and drum kit. Some ensembles may use different instruments in these roles. For example, a 1920s-style Dixieland jazz band may use tuba as a bass instrument and banjo as the chordal instrument. A 1980s-era jazz-rock fusion band may use synth bass for the bassline and a synthesizer for chords. Some bands add one or more percussionists.

In small groups, the rhythm section members typically improvise their accompaniment parts. Bass instrument players improvise a bassline using the chord progression of the key as a guide. Common styles of bass comping parts include a walking bassline for 1920s-1950s jazz; rock-style ostinato riffs for jazz-rock fusion; and Latin basslines for Latin jazz. Improvised basslines typically outline the harmony of each chord by playing the root, third, seventh and fifth of each chord, and playing any other notes that the composer has requested in the chord (e.g., if the chord chart indicates a sixth chord on the tonic in C Major, the bassist might include the sixth degree of the C Major scale, an "A" note, in their bassline).

The chordal instrument players improvise chords based on the chord progression. Chordal instrument players use jazz chord voicings that are different from those used in popular music and classical music from the common practice period. For example, if a pop musician or one from the Baroque music era (ca. 1600-1750) were asked to play a dominant seventh chord in the key of C Major, they would probably play a root position chord named G7 (or "G dominant seventh"), which consists of the notes G, B, D and F, which are the root, third, fifth and flat seventh of the G chord. A post-Bebop era jazz player who was asked to play a dominant seventh chord in the key of C Major might play an altered dominant chord built on G. An altered dominant contains flattened or sharpened "extensions" in addition to the basic elements of the chord. As well, in jazz, chordal musicians often omit the root, as this role is given to the bass player. The fifth of the chord is often omitted as well, if it is a perfect fifth above the root (as is the case in regular major chords and minor chords).

The altered extensions played by a jazz guitarist or jazz pianist on an altered dominant chord on G might include (at the discretion of the performer) a flatted ninth A♭ (a ninth scale degree flattened by one semitone); a sharp eleventh C♯ (an eleventh scale degree raised by one semitone) and a flattened thirteenth E♭ (a thirteenth scale degree lowered by one semitone). If the chordal playing musician were to omit the root and fifth of the dominant seventh chord (the G and D) and keep the third (B) and flatted seventh (F), and add the altered tones just listed (A♭, C♯ and E♭), the resulting chord would be the pitches B, C♯, E♭, F, A♭, which is a much different-sounding chord than the standard G7 played by a pop musician (G, B, D, F). In Classical harmony and in pop music, chord voicings often double the root to emphasize the foundation of the chord progression.

Soloing techniques

Melodic variation and playing by ear

From the dixieland era through to the swing music era, many solo performers improvised by varying and embellishing the existing melody of a song and by playing by ear over the chord changes using well-known riffs. While this approach worked well during these musical eras, given that the chord progressions were simpler and used less modulation to unusual keys, with the development of bebop in the 1940s, the embellishment and "playing by ear" approach was no longer enough.

Although swing was designed for dancing, bebop was not. Bebop used complex chord progressions, unusual altered chords and extended chords, and extensive modulations, including to remote keys that are not closely related to the tonic key (the main key or home key of a song). Whereas Dixieland and swing tunes might have one chord change every two bars with some sections with one chord change per bar, bebop tunes often had two chord changes per bar with many changing key every four bars. In addition, since bebop was for listening rather than dancing, the tempo was not constrained by danceability; bebop tunes were often faster than those of the swing era.

With bebop's complex tunes and chords and fast tempo, melodic embellishments and playing by ear were no longer sufficient to enable performers to improvise effectively. Saxophone player Charlie Parker began to solo by using scales associated with the chords, including altered extensions such as flattened ninths, sharpened elevenths and flattened thirteenths, and by using the chord tones and themselves as a framework for the creation of chromatic improvisation.

Modes

Modes are all the different musical scales and may be thought of as being derived from various chords. Musicians can use these modes as a pool of available notes. For example, if a musician comes across a C7 chord in a tune, the mode to play over this chord is a C mixolydian scale.

These are various chord derivations that help musicians know which chord is associated with a certain scale or mode:

Targeting

One of the key concepts of improvisation is targeting, a technique used by Parker. [1] Targeting means landing on the tones of a chord. A chord is built of a root (1st) and the notes a 3rd, 5th, 7th, 9th, 11th and 13th above the root in the scale. There are a number of ways to target a chord tone. The first is by ascending or descending chromatic approach (chromatic targeting). This means playing the note a semitone above or below one of the chord tones. In the key of C, the notes in the tonic chord are C(1st or root of chord), E(3rd), G(5th), and B(7th). So by playing a D sharp at the end of a line then resolving (moving up a semitone) to an E, this would be one basic example of targeting and would be targeting the third of the chord (E♮). This may be used with any factor of any type of chord, but rhythm is played so that the chord tones fall on the downbeats. [1]

In Bebop melodic improvisation, targeting often focused on the 9th, 11th and 13th of the chord - the colour tones - before resolving later in the phrase to a 7th chord tone. In bebop the 9th, 11th and 13th notes were often altered by adding sharps or flats to these notes. Ninths could be flatted or sharpened. Elevenths were typically played sharpened. Thirteenths were often played flat. Enclosure is the use of scale tone(s) above the targeted note and chromatic tone(s) below, or scale tone(s) below and chromatic tone(s) above. [1]

"Flat 9" theory

Another technique in jazz improvisation used by Parker [1] is known "three to flat nine". These numbers refer to degrees of the scale above the root note of a given chord in a chord progression. This is a bebop approach similar to targeting. This technique can be used over any dominant chord that can be treated as a flat nine (b9) dominant chord. It entails moving from the third of a dominant chord, to the flat nine of a dominant chord, by skipping directly to the ninth, or by a diminished arpeggio (ascending: 3rd, 5th 7th, ♭9th). The chord often resolves to a major chord a perfect fourth away. For example, the third of a G7 chord is B, while the flat ninth is A♭. The chord resolves to C and the note A♭ leads to G. [1]

Pentatonics

Pentatonic scales are also commonly used in jazz improvisation, drawing perhaps from their use in the blues. Saxophone player John Coltrane used pentatonics extensively. Most scales are made up of seven notes: (in the key of C – the major scale) C D E F G A B). The major pentatonic scale comprises only five notes of the major scale (C pentatonic scale is C D E G A), whereas the minor pentatonic scale comprises the five notes (C E♭ F G B♭). Pentatonics are useful in pattern form and that is how they are usually played. One pattern using the pentatonic scale could be 3 6 5 2 3 5 (in C: E A G D E G). Pentatonic scales also became popular in rock music, jazz fusion and electric blues.

Cells and lines

Lines (also known as licks) are pre-planned ideas the artist plays over and over during an improvised solo. Lines can be obtained by listening to jazz records and transcribing what the professionals play during their solos. Transcribing is putting what you hear in a record onto music paper. Cells are short musical ideas. They are basically the same things as lines, but they are shorter.

Phrasing

Phrasing is a very important part of jazz players' set of improvisational skills. Instead of just playing a sequence of scale and chord notes that would work based on the chords, harmony, etc., the player builds an idea based on a melodic motif or a rhythmic motif. The player in effect extemporizes a new melody for a tune's chord progression. Alto saxophonist Charlie Parker, who is considered to be an exemplar of jazz improvisation, paid special attention to the beginning and ending of his solos where he placed signature patterns that he developed over the years. [2] The middle part of his solos used more extemporaneous material that was created in the moment. This shows a developed style of musical phrasing where the shape of the melody has a logical conclusion. With his strong beginning, Parker was free to create solos that demonstrated musical phrasing, and led to a logical and memorable conclusion. Examples of this motif-based approach in a compositional context are found in classical music. In Beethoven's fifth symphony, the first rhythmic and melodic idea is played again with many variations. [2]

The social dimension

Jazz improvisation includes a multitude of social protocols for which the musicians have to adhere to. [3] However, "there is no Emily Post handbook for these protocols, but people who drink in the culture of jazz learn what these conventions are." [3] There are no strict rules, but rather general social protocols that guide the players through when to begin their improvisational solo and when to end. [3] These social protocols also tell the player vaguely what to solo about, for example it is a nice gesture to take parts or an end of the previous musician's solo to then incorporate into the new improviser's solo. [3] For beginning jazz listeners, it can be difficult to understand the structure of a jazz solo and how it fits into the overall song. [4] It may take some time for a listener to even recognize that there is a distinct format for solos in jazz music. [4] Additionally, understanding the role of improvisation in jazz can be challenging to gain from just listening alone, which is why seasoned listeners may be able to recognize solos and formats after "drinking in the culture of jazz" [3] for a longer period of time, therefore, the superficial aspect of a jazz solo is inherently tied to its situational context. [4] The enjoyment and comprehension of a spectator who is unacquainted with the regulations or benchmarks of a sport is similarly lacking in comparison to the enjoyment and comprehension of a listener who is not conversant in the conventions of jazz. [4] In summary, to appreciate jazz improvisation, it is important to not only consider the sound of the music, but also the social and moral dimensions of the art form, including the underlying social structures and the ways in which musicians interact and express themselves. [5]

Search for the self

According to one model of repetition, defined by Gilles Deleuze, is the synthesis of time through memory that creates something new for the subject who is remembering. The past is repeated and related to other past events, creating a new understanding of the past. However, this repetition is still closed, as the subject only remembers things that confirm their existing identity. This means that any attempt at self-realization is ultimately unsuccessful. [6] Jazz improvisers must use their memory in order to interpret the form of a song and to reference how other musicians have interpreted it in their own improvisations. The challenge for the improviser is to repeat the form in a recognizable way, but to also improvise on it in a way that is original and distinguishes them from other musicians. This repetition allows the audience to recognize the form and the improviser's own style, but according to Theodor Adorno, it ultimately only reinforces the improviser's existing ideas of themselves and does not allow for true self-realization. [6] On the other hand, The concept of signifyin(g) as repetition with a difference, which means that the identity of any particular instance of signifyin(g) and the person engaging in it is constantly changing and influenced by what has come before. This idea, put forward by Henry Louis Gates and Jacques Derrida, also implies that all improvisation is connected to previous instances of the art form, making it impossible for an improviser to be truly autonomous. This complicates the identity of any particular improvisation and the improviser themselves. [7]

In psychoanalysis, repetition is an important aspect of identity formation and is associated with what Sigmund Freud called the death drive. This drive goes against the pleasure principle, which states that people will avoid unpleasurable experiences, and instead compels people to repeat traumatic or unpleasant events. According to Freud, this drive is fundamental to the human psyche and is connected to the unconscious. It seeks to return the psyche to its original, quiescent state and to a sense of unity with itself. This repetition and the associated narcissism can be seen in some jazz improvisations, where the desire for self-realization can be self-absorbing and self-negating. [6]

Influence

Improvisational music also has a social dimension that is influenced by the time, place, history, and culture in which it is performed. This means that listening to improvisational music can be a way to engage with these specific historical and cultural contexts. Improvisation not only shows how people create and shape music, but it can also provide insight into the ways that people think and act. Particular improvisations can have significance because of the specific historical situations in which they were created. [3] Jazz performers pick up cultural attitudes and historical memory, making them their own through improvisation: “memory figures… in a memory of the form, in the first place, but also in a memory of all the ways that form has been rendered by other players and by the improviser herself”. [6] Therefore, the memory of the Jazz piece and the reiteration of the piece helps to insert fragments of the player’s self into the music, as it's hard to remember exactly what a particular Jazz piece was, primarily if it wasn't composed. In other words, the player utilizes their knowledge of past sounds and reiterates a new song based on past precedents, intuition, and culture.

Ethics

Many people believe that the social aspect of jazz improvisation can serve as a good foundation for ethics. Kathleen Higgins argues that the way that individuals and groups interact and improvise in jazz can be seen as a model for ethical interactions, particularly between minority and majority populations. This idea is supported by Ingrid Monson, a musicologist, and Jacques Attali, an economist and scholar. [3] Eugene W. Holland has proposed jazz improvisation as a model for social and economic relations in general. [8] [9] Edward W. Sarath has proposed jazz improvisation as a model for change in music, education, and society. [10]

Jazz improvisation can also be seen as a model for human interactions. Jazz improvisation presents an image or representation of the ways in which humans engage with and interact with one another and the world around them, through a variety of linguistic, gestural, and expressive means. Through this process, musicians can collectively negotiate and ultimately constitute their shared musical and cultural space, [11] which is important to the ethics of jazz improvisation since it highlights the collaborative and interactive nature of jazz improvisation and how music reflects and engages with the world.

Related Research Articles

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<span class="mw-page-title-main">Jazz guitar</span> Jazz instrument and associated playing style

Jazz guitar may refer to either a type of electric guitar or a guitar playing style in jazz, using electric amplification to increase the volume of acoustic guitars.

<span class="mw-page-title-main">Rhythm guitar</span> Technique providing rhythm and harmony to an ensemble

In music performances, rhythm guitar is a technique and role that performs a combination of two functions: to provide all or part of the rhythmic pulse in conjunction with other instruments from the rhythm section ; and to provide all or part of the harmony, i.e. the chords from a song's chord progression, where a chord is a group of notes played together. Therefore, the basic technique of rhythm guitar is to hold down a series of chords with the fretting hand while strumming or fingerpicking rhythmically with the other hand. More developed rhythm techniques include arpeggios, damping, riffs, chord solos, and complex strums.

An altered chord is a chord that replaces one or more notes from the diatonic scale with a neighboring pitch from the chromatic scale. By the broadest definition, any chord with a non-diatonic chord tone is an altered chord. The simplest example of altered chords is the use of borrowed chords, chords borrowed from the parallel key, and the most common is the use of secondary dominants. As Alfred Blatter explains, "An altered chord occurs when one of the standard, functional chords is given another quality by the modification of one or more components of the chord."

The term blues scale refers to several different scales with differing numbers of pitches and related characteristics. A blues scale is often formed by the addition of an out-of-key "blue note" to an existing scale, notably the flat fifth addition to the minor pentatonic scale. However, the heptatonic blues scale can be considered a major scale with altered intervals.

In a musical composition, a chord progression or harmonic progression 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. Chord progressions are the foundation of popular music styles, traditional music, as well as genres such as blues and jazz. In these genres, chord progressions are the defining feature on which melody and rhythm are built.

A jazz scale is any musical scale used in jazz. Many "jazz scales" are common scales drawn from Western European classical music, including the diatonic, whole-tone, octatonic, and the modes of the ascending melodic minor. All of these scales were commonly used by late nineteenth and early twentieth-century composers such as Rimsky-Korsakov, Debussy, Ravel and Stravinsky, often in ways that directly anticipate jazz practice. Some jazz scales, such as the bebop scales, add additional chromatic passing tones to the familiar diatonic scales.

<span class="mw-page-title-main">Chord (music)</span> Harmonic set of three or more notes

In music, a chord is a group of two or more notes played simultaneously, typically consisting of a root note, a third, and a fifth. Chords are the building blocks of harmony and form the harmonic foundation of a piece of music. They can be major, minor, diminished, augmented, or extended, depending on the intervals between the notes and their arrangement. Chords provide the harmonic support and coloration that accompany melodies and contribute to the overall sound and mood of a musical composition. For many practical and theoretical purposes, arpeggios and other types of broken chords may also be considered as chords in the right musical context.

<span class="mw-page-title-main">Bassline</span> Low-pitched instrumental part

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<span class="mw-page-title-main">Extended chord</span>

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<span class="mw-page-title-main">Chord substitution</span> Technique of using a chord in place of another in a progression of chords

In music theory, chord substitution is the technique of using a chord in place of another in a progression of chords, or a chord progression. Much of the European classical repertoire and the vast majority of blues, jazz and rock music songs are based on chord progressions. "A chord substitution occurs when a chord is replaced by another that is made to function like the original. Usually substituted chords possess two pitches in common with the triad that they are replacing."

<span class="mw-page-title-main">Tritone substitution</span> Music theory concept

The tritone substitution is a common chord substitution found in both jazz and classical music. Where jazz is concerned, it was the precursor to more complex substitution patterns like Coltrane changes. Tritone substitutions are sometimes used in improvisation—often to create tension during a solo. Though examples of the tritone substitution, known in the classical world as an augmented sixth chord, can be found extensively in classical music since the Renaissance period, they were not heard until much later in jazz by musicians such as Dizzy Gillespie and Charlie Parker in the 1940s, as well as Duke Ellington, Art Tatum, Coleman Hawkins, Roy Eldridge and Benny Goodman.

<span class="mw-page-title-main">Jazz harmony</span> Harmonic music theory as it applies to Jazz

Jazz harmony is the theory and practice of how chords are used in jazz music. Jazz bears certain similarities to other practices in the tradition of Western harmony, such as many chord progressions, and the incorporation of the major and minor scales as a basis for chordal construction. In jazz, chords are often arranged vertically in major or minor thirds, although stacked fourths are also quite common. Also, jazz music tends to favor certain harmonic progressions and includes the addition of tensions, intervals such as 9ths, 11ths, and 13ths to chords. Additionally, scales unique to style are used as the basis of many harmonic elements found in jazz. Jazz harmony is notable for the use of seventh chords as the basic harmonic unit more often than triads, as in classical music. In the words of Robert Rawlins and Nor Eddine Bahha, "7th chords provide the building blocks of jazz harmony."

Jazz chords are chords, chord voicings and chord symbols that jazz musicians commonly use in composition, improvisation, and harmony. In jazz chords and theory, most triads that appear in lead sheets or fake books can have sevenths added to them, using the performer's discretion and ear. For example, if a tune is in the key of C, if there is a G chord, the chord-playing performer usually voices this chord as G7. While the notes of a G7 chord are G–B–D–F, jazz often omits the fifth of the chord—and even the root if playing in a group. However, not all jazz pianists leave out the root when they play voicings: Bud Powell, one of the best-known of the bebop pianists, and Horace Silver, whose quintet included many of jazz's biggest names from the 1950s to the 1970s, included the root note in their voicings.

<span class="mw-page-title-main">Slash chord</span> A chord whose bass note is indicated by a slash

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 not indicate "or". For example, a C major chord (C) in second inversion is written C/G or C/G bass, which reads "C slash G", "C over G" or "C over a G bass". Some chords may not otherwise be notated, such as A♭/A. Thus, a slash chord may also indicate the chord form or shape and an additional bass note.

Bebop scale is a term referring to the practice of adding a note to any common seven tone scale in order to make it an eight tone scale. Having eight notes enables the primary chord tones to continuously fall on the on-beats when the scale is played sequentially. This is unlike common seven note scales in which the chord tones do not all naturally fall on the on-beats due to an odd number of notes. These bebop scales are frequently used in jazz improvisation. Jazz educator David Baker nicknamed these scales the "bebop scales" because they were used often by jazz artists from the Bebop Era. These artists include Charlie Christian, Charlie Parker, Bud Powell, and Dizzy Gillespie, to name a few.

In music, harmonization is the chordal accompaniment to a line or melody: "Using chords and melodies together, making harmony by stacking scale tones as triads".

<span class="mw-page-title-main">Glossary of jazz and popular music</span> List of definitions of terms and jargon used in jazz and popular music

This is a glossary of jazz and popular music terms that are likely to be encountered in printed popular music songbooks, fake books and vocal scores, big band scores, jazz, and rock concert reviews, and album liner notes. This glossary includes terms for musical instruments, playing or singing techniques, amplifiers, effects units, sound reinforcement equipment, and recording gear and techniques which are widely used in jazz and popular music. Most of the terms are in English, but in some cases, terms from other languages are encountered.

Musicians use various kinds of chord names and symbols in different Contexts Chord notation is a system used to represent chords in written music or chord charts. It typically consists of one or more letters representing the root note of the chord, along with additional symbols or letters indicating the chord quality, extensions, and alterations. For example, the chord notation "CMA J7" represents a C major seventh chord, while "Dm7b5" represents a D minor seventh flat five chord. Chord notation allows musicians to quickly understand and play various chords in a piece of music without having to read the full musical score. to represent musical chords. In most genres of popular music, including jazz, pop, and rock, a chord name and its corresponding symbol typically indicate one or more of the following:

  1. the root note,
  2. the chord quality,
  3. whether the chord is a triad, seventh chord, or an extended chord,
  4. any altered notes,
  5. any added tones, and
  6. the bass note if it is not the root.

References

  1. 1 2 3 4 5 Christiansen, Cory (2001). Mel Bay presents essential jazz lines, the style of Charlie Parker (Guitar ed.). Mel Bay Publications. p. 15. ISBN   9780786660735.
  2. 1 2 Bash, L. (1991). Improving improvisation. Music Educators Journal, 78(2), 44.
  3. 1 2 3 4 5 6 7 Alperson, Philip (2010). "A Topography of Improvisation". The Journal of Aesthetics and Art Criticism. 68 (3): 273–280. ISSN   0021-8529. JSTOR   40793268.
  4. 1 2 3 4 Love, Stefan Caris (2016). "The Jazz Solo as Virtuous Act". The Journal of Aesthetics and Art Criticism. 74 (1): 61–74. doi:10.1111/jaac.12238. ISSN   0021-8529. JSTOR   44510215.
  5. ↑ Iseminger, Gary (2010). "Sonicism and Jazz Improvisation". The Journal of Aesthetics and Art Criticism. 68 (3): 297–299. ISSN   0021-8529. JSTOR   40793272.
  6. 1 2 3 4 Carvalho, John M. (2010). "Repetition and Self-Realization in Jazz Improvisation". The Journal of Aesthetics and Art Criticism. 68 (3): 285–290. ISSN   0021-8529. JSTOR   40793270.
  7. ↑ Benson, Bruce Ellis (2006). "The Fundamental Heteronomy of Jazz Improvisation". Revue Internationale de Philosophie. 60 (238 (4)): 453–467. doi:10.3917/rip.238.0453. ISSN   0048-8143. JSTOR   23955747. S2CID   170657613.
  8. ↑ Holland, Eugene W. (2008). "Jazz Improvisation: Music of the People-to-Come". Deleuze, Guattari and the Production of the New, Simon O'Sullivan & Stephen Zepke, Eds.: 196–205.
  9. ↑ Holland, Eugene W. (2004). "Studies in Applied Nomadology: Jazz Improvisation and Post-Capitalist Markets". Deleuze and Music, Ian Buchanan & Marcel Swiboda, Eds.: 20–35.
  10. ↑ Sarath, Edward W. (2014). Improvisation, Creativity, and Consciousness: Jazz as Integral Template for Music, Education, and Society. SUNY series in Integral Theory. ISBN   978-1438447223.
  11. ↑ Hagberg, Garry (2006). "Jazz Improvisation : A Mimetic Art?". Revue Internationale de Philosophie. 60 (238 (4)): 469–485. doi:10.3917/rip.238.0469. ISSN   0048-8143. JSTOR   23955748. S2CID   170287150.
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