Fact-checked by Grok 2 weeks ago

Retrograde inversion

Retrograde inversion is a fundamental transformation in twelve-tone serial music, where the intervals of a are inverted—meaning each ascending interval becomes descending and vice versa—and the resulting sequence is then reversed in order, or equivalently, the is first reversed and then inverted. This operation produces one of the four basic row forms (alongside the , , and ) that composers manipulate to generate all twelve pitch classes without repetition, ensuring structural unity in atonal compositions. Developed as part of the pioneered by in the early , retrograde inversion allows for systematic variation while preserving the row's intervallic content, often notated as followed by a subscript indicating the final (e.g., RI₀ for the form ending on the ). In practice, it is derived mathematically from sets, where inversion flips each integer a to $12 - a \mod 12, and retrograde simply reverses the sequence; for example, starting from the set [3, 5, 11], inversion yields [9, 7, 1], and retrograde inversion then gives [1, 7, 9]. This transformation, combined with transposition, expands a single row into 48 distinct forms, forming the basis of serial composition in works by , , and . Beyond its technical role, retrograde inversion contributes to the perceptual symmetry and coherence in serial music, as it mirrors the prime row in both direction and interval structure, enabling composers to create palindromic or balanced phrases. It is typically analyzed using tools like the matrix, where RI forms appear as columns read from bottom to top, facilitating the identification of row properties such as all-interval series or hexachordal combinatoriality. While integral to strict dodecaphony, the concept has influenced broader post-tonal practices, including integral by composers like , who extended it to durations and dynamics.

Fundamentals

Definition

Retrograde inversion is a musical that combines two fundamental operations applied to a of or pitch classes: , which reverses the order of the while preserving the , and , which flips the direction of each (upward become downward, and vice versa) relative to the starting . This results in a new that is both reordered and directionally mirrored, serving as a key technique in atonal and serial for generating varied yet related pitch structures. Unlike a simple retrograde, which merely plays the sequence in reverse, or an inversion, which mirrors intervals without reordering, retrograde inversion integrates both processes to produce a distinct form of pitch organization that maintains structural relationships while altering perceptual contour. For illustration, consider a basic four-note pitch-class series: C (0), E (4), G (7), B (11). The inversion form is C (0), A♭ (8), F (5), C♯ (1), obtained by negating the original intervals (+4, +3, +4 semitones) from the starting pitch. Reversing this yields the retrograde inversion: C♯ (1), F (5), A♭ (8), C (0), demonstrating the combined transformation under octave equivalence. In twelve-tone , retrograde inversion constitutes one of the four basic row forms—prime, , inversion, and retrograde inversion—enabling composers to derive multiple variants from a single for thematic development.

Relation to Other Transformations

In twelve-tone , retrograde inversion (RI) belongs to a family of four fundamental transformations applied to a : the prime form (P), (R), inversion (I), and retrograde inversion (RI). These operations enable composers to generate related variants of the row while preserving its pitch-class set and the of consecutive sizes. The (R) reverses the order of the prime form without changing the sizes of the between consecutive , resulting in a backward traversal that flips the direction of each and reverses their . In comparison, the inversion (I) preserves the order but inverts the direction of each —turning ascending motions descending and vice versa—while keeping sizes and their succession intact, thereby altering the melodic without reversal. (RI), also known as the inverse retrograde, combines these effects by applying reversal to the inversion (or inversion to the retrograde), yielding a form where both order and directions are transformed simultaneously. The interrelations among these forms can be summarized as follows:
FormAbbreviationKey Transformation from PrimeTypical Transposition Reference
PrimePOriginal pitch sequenceFirst pitch
RetrogradeRReversal of pitch order; directions flippedLast pitch
InversionIInterval directions inverted; order preservedFirst pitch
Retrograde InversionRIReversal of inverted order; both effectsLast pitch
This structure highlights symmetries, such as the equivalence of the of the inversion to the inversion of the . These transformations maintain content by preserving the sizes of consecutive s (as absolute values), even as they alter the sequence order and directional signs, which changes the row's and succession without introducing new pitches or repetitions. Together with transpositions, the four forms provide the basis for deriving all 48 permutations of a in .

Derivation and Construction

Steps to Derive Retrograde Inversion

To derive the retrograde inversion (RI) of a twelve-tone series, begin with the prime form (P), which serves as the foundational row consisting of all twelve classes in a specific order. The four basic row forms—prime (P), retrograde (R), inversion (I), and retrograde inversion ()—are generated from this starting point through interval transformations and reversals. The process involves three sequential steps, relying on semitone interval measurements within the modular 12 pitch-class system, where pitch classes are numbered 0 to 11 and equivalents wrap around (e.g., -1 mod 12 = 11).
  1. Identify the prime form (P): Select the original series as the starting point. For example, consider a simple three-note segment for illustration: P = [0, 2, 4], representing pitch classes such as C (0), D (2), and E (4). The full twelve-tone row would extend this principle to all twelve unique pitch classes without repetition.
  2. Derive the inversion (I): Reverse the direction of each in the prime form while preserving their magnitudes, measured in semitones. An ascending of +n semitones becomes descending -n semitones (or equivalently + (12 - n) mod 12 to maintain positive values if preferred). Starting from the first pitch class of P (typically normalized to 0 for calculation), accumulate these inverted intervals. For the example P = [0, 2, 4], the intervals are +2 (from 0 to 2) and +2 (from 2 to 4). Inverting yields -2 and -2: begin at 0, subtract 2 to reach 10 (0 - 2 mod 12 = 10), then subtract 2 again to reach 8 (10 - 2 mod 12 = 8). Thus, I = [0, 10, 8]. This step ensures the inverted form mirrors the prime's but flips its directional profile.
  3. Reverse the inverted series to obtain RI: Take the order of pitches in the inversion and reverse it entirely, without altering the pitch classes themselves. For the example I = [0, 10, 8], reversing yields = [8, 10, 0]. This combines the mirror-image intervals of inversion with the backward sequencing of . The resulting RI form can be transposed if needed, but the core derivation remains tied to the original P.
In formula terms, the retrograde inversion is expressed as RI(n) = reverse(I(P)), where I(P) denotes the inversion operation that flips the signs of the intervals in P(n), and reverse reorders from end to beginning. Common pitfalls in this derivation include mishandling octave equivalence, which requires all calculations to operate modulo 12 to avoid linear pitch extensions beyond the , and confusing pitch-class sets with ordered rows—ensuring no repetitions occur while maintaining the exact . For instance, negative intervals must be normalized (e.g., -5 mod 12 = 7) to fit the 0-11 range correctly.

Notation in Twelve-Tone Serialism

In twelve-tone serialism, the retrograde inversion (RI) of a is notated using the abbreviation "RI" followed by a subscript or superscript index number indicating the transposition level, specifically the pitch-class integer of the row's final note. This convention differs from the prime (P) and inversion (I) forms, which use the initial pitch class for labeling, ensuring consistent identification across the 48 possible row forms derived from a single prime row through transposition, retrograde, and inversion operations. For instance, RI5 denotes the retrograde inversion that concludes on 5. Pitch classes in this system are represented by integers from 0 to 11, where C corresponds to , C♯/D♭ to , D to 2, and so on up to B at 11, facilitating for transpositions and interval calculations. This integer notation allows for precise depiction of RI forms; for example, if the prime row is [0, 1, 4, 6, 8, 10, 11, 3, 7, 9, 2, 5], its 0 would be the reverse-ordered inversion ending on 0, [7, 10, 3, 5, 9, 1, 2, 4, 6, 8, 11, 0] after applying the transformations. The 12 transpositions of the RI form, along with those of P, I, and R, collectively form the complete set of 48 row forms, which are often visualized in a twelve-tone —a 12-by-12 array that systematically displays all variants. In such matrices, P forms appear as horizontal rows from left to right, I forms as vertical columns from top to bottom, R forms as horizontal rows from right to left, and RI forms as vertical columns from bottom to top, enabling composers and analysts to identify relationships at a glance. For a representative based on the row [0,1,4,6,8,10,11,3,7,9,2,5], the RI transpositions would occupy the upward-reading columns, with each starting pitch determined by the matrix's structure. RI forms contribute to combinatoriality, a property where the hexachords (six-note segments) of an RI row and another row form (such as P or I) partition the chromatic aggregate without overlap when aligned. This interaction, particularly in semi-combinatorial pairs involving P-RI relations, allows multiple row forms to interweave polyphonically while maintaining pitch-class balance, as seen in rows where the first hexachord of P0 combines with the second hexachord of RI_t to form a complete 12-note set.

Historical Development

Origins in Atonal and Serial Music

The concept of retrograde inversion emerged during Arnold Schoenberg's atonal period, beginning around , as an extension of freer inversion techniques applied to melodic and motivic shapes in works that abandoned traditional tonal centers. These early applications involved mirroring intervals and reversing orders sporadically to maintain motivic unity without systematic , reflecting Schoenberg's evolving approach to pitch organization amid the crisis of . By the early 1920s, these techniques became more explicit in transitional works like the Five Piano Pieces (Op. 23, 1923), marking the shift toward structured application. In Pierrot Lunaire (Op. 21, 1912), melodic lines occasionally reverse and invert prior motifs to heighten expressionistic tension, though not yet as a governing principle. The key milestone came with the formalization of the twelve-tone technique around 1923, where retrograde inversion was established as one of four basic row operations—alongside prime, retrograde, and inversion—to ensure all twelve pitches receive equal treatment and prevent hierarchical dominance. In his 1923 essay "Twelve-Tone Composition," Schoenberg outlined these operations as essential for polyphonic coherence in atonal music. Schoenberg later codified retrograde inversion's role in his 1950 collection Style and Idea, emphasizing its necessity for serial unity by deriving it as the retrograde of the inversion, thereby completing the set of mirror forms that underpin twelve-tone coherence. This theoretical framework solidified retrograde inversion as a cornerstone of serial music, ensuring structural equality across transformations.

Adoption by Key Composers

, the originator of , prominently adopted retrograde inversion as a core transformation in his Suite for Piano, Op. 25 (1923), employing it alongside the prime form, inversion, and retrograde to generate eight of the possible 48 row variants, transposed primarily at the interval. This application structured the suite's movements, such as the canonically linked permutations in the Menuett–Trio, where retrograde inversion facilitated the adaptation of traditional forms to organization while preserving motivic coherence. Anton Webern further emphasized retrograde inversion for motivic economy in his Symphony, Op. 21 (1928), leveraging the row's inherent symmetry—where the prime form relates directly to its retrograde inversion transposed by a —to limit distinct variants to 24 and enable concise canonic constructions across movements. In the second movement's variations, for instance, retrograde inversions appear in canons like Variation 6, intertwining with inverted forms to derive all material from shared trichordal motives such as (013) and (014), thus achieving structural density through transformation rather than expansion. Alban Berg integrated retrograde inversion more expressively in the Lyric Suite (1926), his first major twelve-tone work, where it paired with inversions to form invariant-rich pitch areas that evoked lyrical symmetry and subtly recalled tonal gestures amid serial rigor. These pairings, often in retrograde-inversion forms, supported the suite's emotional narrative, as in the first movement's thematic developments, blending atonal derivations with hexachordal overlaps reminiscent of triadic harmony to heighten dramatic intimacy. In the post-war era, and extended retrograde inversion's role within total serialism during the , applying it not only to rows but also analogously to serialized parameters like and dynamics for multifaceted control. , in works like Structures Ia (1952), incorporated retrograde inversions into probabilistic arrays derived from Messiaen's modes, while explored them in Kreuzspiel (1951) to synchronize transformations across instruments, pushing serial symmetry toward spatial and temporal integration. This adoption evolved to enable palindromic and symmetric rows in later serial compositions, where retrograde inversion created mirror structures that unified forms, as exemplified in Webern's influence on successors through rows like that of the String Quartet, Op. 28 (1936–38), whose second hexachord is the retrograde inversion of the first, halving unique variants and fostering organic coherence.

Applications and Examples

Use in Twelve-Tone Compositions

In twelve-tone , retrograde inversion (RI) serves a crucial structural role by generating one of the four primary row forms—alongside the prime (P), retrograde (R), and inversion (I)—that collectively ensure the equal treatment of all twelve pitch classes, thereby avoiding any tonal hierarchy or emphasis on specific notes. This equivalence among row forms allows composers to derive up to 48 distinct permutations through , fostering a comprehensive exploitation of the without repetition until the full row is stated. RI finds practical applications in thematic development, where it provides a transformed version of the original row to create motivic variations while maintaining serial integrity; in counterpoint, it is often paired with complementary forms such as P against RI to build intricate polyphonic textures; and in form-building, it contributes to overarching architectural unity by linking sections through related derivations. These uses enable composers to manipulate row forms systematically for expressive contrast within the atonal framework. A key benefit of RI lies in its preservation of the row's interval vectors—the multiset of all unordered intervals—while altering the melodic and directional flow, thus introducing variety without disrupting the pitch-class set's atonal properties. In all-interval rows, where each adjacent pair yields a unique from 1 to 11, retains this exhaustive interval coverage, often revealing symmetric or features that enhance combinatorial potential in . Beyond pitch organization, RI extends briefly to non-pitch parameters in integral , where composers like and apply analogous transformations to serialized rhythms and dynamics, deriving retrograde-inverted sequences for durations or intensity levels to achieve total parametric control.

Examples from Specific Works

In Arnold Schoenberg's Wind Quintet, Op. 26 (1924), the basic twelve-tone row begins with the pitch sequence E♭–G–A–B–C♯–C–B♭–D–E–F♯–A♭–F, which is partitioned symmetrically into hexachords to facilitate canonic among the instruments. The retrograde inversion (RI) of this row, obtained by inverting the intervals around the row's axis (typically C/F♯) and then reversing the order, appears prominently in the third movement (""), starting at measure 46 with three full statements transposed to diverge rather than interlock, creating a layered contrapuntal . This canonic application of RI at measure 82 interlocks with the prime form to reinforce thematic unity, as the diverging transpositions allow for varied timbral contrasts while preserving the row's aggregate integrity across the ensemble. By integrating RI canonically, Schoenberg achieves a balance between motivic development and serial cohesion, contributing to the movement's rhythmic propulsion and structural disunity resolved through recurrence. Anton Webern's Concerto, Op. 24 (1934) employs a row structured around recurring trichords for maximal invariance, with the prime form (P0) given as B♭–D–F–E–A–C–B–E♭–G–F♯–A♭–D♭, where every three-note segment maintains the same interval content under transformation. The retrograde inversion (RI0), such as C–A♭–A–E–F–D♭–E♭–D–F♯–G–B–B♭, is used to generate pointillistic textures by distributing trichords across the nine solo instruments, as seen in the opening measures where RI forms overlap to produce sparse, fragmented timbres. For instance, the and present complementary RI segments that align hexachordally, ensuring complete aggregates without repetition and enhancing the work's spatial, effects. This deployment of RI fosters a sense of disunity through timbral fragmentation while unifying the concerto via trichordal relations, underscoring Webern's emphasis on registral and color as structural elements. In Milton Babbitt's Composition for Twelve Instruments (1948), the row [0,1,4,9,5,8,3,7,6,11,10,2] (with 0 as C) is designed for combinatoriality, where the retrograde inversion (RI) shares hexachordal content with the prime form to enable aggregate-forming superpositions in the ensemble. Babbitt arrays multiple row forms, including RI transpositions, to create cyclical structures across the fifteen sections, as in the duos and trios where RI segments from different instruments combine without pitch overlap, forming complete twelve-tone aggregates. For example, the retrograde inversion of the first hexachord aligns combinatorially with the second hexachord of a transposed prime, facilitating dense contrapuntal webs that exploit the row's source sets for timbral variety. Through these RI-based combinatorial arrays, Babbitt achieves hyper-serial integration, where the transformation not only unifies pitch organization but also coordinates instrumental groupings, contributing to the piece's intricate balance of local detail and global symmetry.

Theoretical Properties

Structural Characteristics

Retrograde inversion (RI), as one of the four basic row forms in twelve-tone alongside the prime (P), (R), and inversion (I), preserves the unordered content of the original prime form while altering the direction of through combined reversal and mirroring. Specifically, the of sizes between consecutive classes remains identical to that of P, ensuring structural equivalence in terms of pitch relationships, but the signed (directed) are negated and reversed, which can introduce new linear tensions or resolutions in melodic unfolding. This preservation stems from the operations' within the chromatic space, maintaining the row's atonal integrity without introducing duplicate pitches. A structural feature of is its potential for , particularly when the prime row possesses inherent palindromic qualities; in such cases, can yield a fully symmetric form where the row reads the same forward and backward after inversion, forming a musical that enhances internal coherence. This arises from reciprocal patterns in the original row, allowing to mirror structural elements across its axis, though such properties are rare and depend on the row's design. In all-interval series—rows where the twelve consecutive intervals comprise each from to 11 exactly once—the RI form's first and last hexachords (six-note segments) correspond precisely to those of the inversion form, facilitating combinatorial pairings that aggregate to the full chromatic set without overlap. This hexachordal alignment underscores RI's role in modular row constructions, where the initial and terminal halves exhibit invariance under specific transformations. Acoustically, RI modifies the registral of the row by inverting and reversing trajectories, which shifts the overall shape from ascending/descending patterns to mirrored or folded paths, thereby altering through changes in and perceptual . These variations influence listener , as experimental studies show reduced recognition accuracy for inverted and reversed forms compared to primes, due to disrupted melodic familiarity.

Retrograde-Inversion Chains

Retrograde-inversion chains, commonly abbreviated as RICH, consist of sequences in twelve-tone in which the retrograde inversion of one serves as the basis for generating the next , thereby creating extended, interconnected structures. This technique builds upon the basic retrograde-inversion operation by linking multiple transformations, often resulting in cyclic progressions that return to the original form after a determined number of steps. The construction of these typically involves cyclic permutations that connect retrograde-inversion forms across or smaller subsets, such as trichords, ensuring intervallic coherence while advancing through the -class space. For instance, a motive's intervals are mirrored and reversed around a pivotal , with the resulting form transposed to overlap or adjoin the preceding segment, forming a that propagates through complementary without immediate repetition. This process leverages the complementary nature of in twelve-tone rows, where the RI transformation of the first aligns with the second, facilitating seamless extension. Theoretical models illustrate these chains through mnemonics, such as associating "RICH" with the for retrograde-inversion chain to aid in conceptualizing the perpetual linking of forms. In practice, employed RI chains in works like Métamorphoses nocturnes (1953–54), where recursive trichordal motives are connected via transformations such as RI⁵ and RI⁶, expanding a chromatic into a continuous structure across the exposition. A key property of retrograde-inversion chains is their ability to ensure comprehensive usage, covering all twelve tones without repetition in a cyclic manner, which supports and structural totality in compositions. These chains promote invariance through shared pitches or intervals between segments, enhancing motivic unity and . In contemporary contexts, retrograde-inversion chains find application in software, where they generate rows and transformations programmatically, as seen in tools that implement retrograde, inversion, and operations for automated music creation.

References

  1. [1]
    34.1 Twelve-Tone Technique
    The retrograde is the prime form backward. The inversion is the original row with all intervals in the row inverted (going in the opposite direction of the ...
  2. [2]
    Basics of Twelve-Tone Theory – Open Music Theory – Fall 2023
    Retrograde inversion forms reverse the pitch classes of inversion forms and are named for the last pitch class in the row form. A real example. Now that we've ...
  3. [3]
    [PDF] Music Through a Mathematical Lens
    Jan 26, 2018 · Definition Retrograde inversion form is a combination of inversion and ret- rograde. It is the inversion form of a pitch-class set with the ...
  4. [4]
    Basics of Twelve-Tone Theory - VIVA's Pressbooks
    Retrograde inversion forms reverse the pitch classes of inversion forms and are named for the last pitch class in the row form.
  5. [5]
    [PDF] The Mathematics of Twelve Tone Music
    The Retrograde Inversion takes the order of elements of the Inversion array and flips it to create a new ordering of the Tone Row, as exemplified in Figure 7.
  6. [6]
    Pitch and Pitch Class – Open Music Theory - VIVA's Pressbooks
    Instead, in set theory, we use integer notation, which assigns a number between 0 and 11 to each pitch class (Example 2).Missing: source | Show results with:source
  7. [7]
    Twelve-Tone Matrix - Music Theory for the 21st-Century Classroom
    One tool analysts create to analyze a twelve-tone composition is a twelve-tone matrix, which shows all 48 row forms in a 12-by-12 grid.Missing: array scholarly
  8. [8]
    Row Properties – Open Music Theory - VIVA's Pressbooks
    Semi-combinatorial pairs are related by one such transformation: transposition (P–P), inversion (P–I), or retrograde inversion (P–RI). All-combinatorial pairs ...
  9. [9]
    Glossary | The Atonal Music of Arnold Schoenberg 1908–1923
    A means of variation by which the order of intervals that underlie a basic shape is maintained in its later appearances, either directly, inverted, or arranged ...Missing: origins | Show results with:origins
  10. [10]
    Atonality and serialism | Chromatone.center
    The twelve-tone technique was preceded by Schoenberg's freely atonal pieces of 1908 ... inversion, retrograde, and retrograde inversion—is called all ...
  11. [11]
    Twentieth-century-music-theory-and-practice-sample (pdf)
    Aug 30, 2025 · ... retrograde inversion, important operations in Schoenberg's twelve-tone method. ... 10 Although Schoenberg and Debussy engaged with the past ...
  12. [12]
  13. [13]
    Serialism and Dodecaphony before Schönberg's Opus 23
    The features of Op. 23 #5 that set it apart from Schönberg's previous works are that it is both serial, and dodecaphonic.<|separator|>
  14. [14]
    [PDF] 1 Schoenberg, Unfolding, and “Composing With Twelve Tones”
    (Schoenberg, “Twelve-Tone Composition,” Style and Idea, 208). The notion of “development” presented in this excerpt could possibly serve as the link Schoenberg.
  15. [15]
    [PDF] Style and Idea - Monoskop
    derived: 1) the inversion; 2) the retrograde; and 3) the retrograde inversion.4 The employment of these mirror forms. 1 Drresponds to the principle of the ...
  16. [16]
    [PDF] Suite, op. 25 - Arnold Schönberg Center
    permutations in this piece (the original row, retrograde, inversion as well as retrograde inversion of the row, and the tritone transpositions) – a ...
  17. [17]
    Suite for Piano Op. 25 (Chapter 2) - Schoenberg's Twelve-Tone Music
    ... inversions are the only ones used in the Suite) that retrograde the pitch classes within the tetrachords but not between them. On the other hand, Reinhold ...
  18. [18]
    Analysis Examples – Webern Op. 21 and 24 – Open Music Theory
    Webern describes the first movement as a “double canon in contrary motion,” where “contrary motion” means the same thing as “inversion.” You could think of the ...
  19. [19]
    [PDF] Anton Webem and the Concept of Symmetrical Inversion
    Example 5. The symmetrically inversional pitch-class patterns of the opening canons of Webem's Symphony, opus 21 (voices aligned).
  20. [20]
    The Lyric Suite and Berg's Twelve-Tone Duality - jstor
    Sep 12, 2008 · “Retrograde and ... structure built on pitch-areas—formed in Berg's case from invariant-rich pairings of row-forms with their inversions.
  21. [21]
    Tonal and "Anti-Tonal" Cognitive Structure in Viennese Twelve-Tone ...
    Oct 22, 2020 · 226) These internal tone-groups were often related to each other by transposition, retrograde, or inversion, so that the whole twelve-tone row ...
  22. [22]
    [PDF] 8 Serialism and the 12-note scale - University of Huddersfield Press
    Retrograde inversion – RI in transposition. Together these two hexachords form a 12-note aggregate. The series is therefore said to show the property of ...
  23. [23]
    Pierre Boulez and the Redefinition of Serialism (Chapter 8)
    This chapter shows that Boulez's serialism was an essential forerunner of future trends, rather than a culmination of an abandoned practice.
  24. [24]
    [PDF] Palindromic Structures in the Music of Bartók and Webern
    Jul 1, 2016 · The remaining sections of the piece keep building on this idea of pairing certain row forms with their retrograde, with the permission of slight ...
  25. [25]
    Twelve-Tone Technique | Music 101 - Lumen Learning
    Schoenberg himself described the system as a “Method of composing with twelve tones which are related only with one another.” It is commonly considered a form ...
  26. [26]
    [PDF] POST–WORLD WAR II CONTEXTS - UCI Music Department
    Boulez developed the basic twelve-tone row through the standard serial transforma- tions of transposition, retrograde, inversion, and retrograde inversion, but ...<|control11|><|separator|>
  27. [27]
    [PDF] An Analysis of Anton Von Webern's Concerto for Nine Instruments
    Webern's row is extremely economical. Every three-note segment of ... G-B-Bb. The next four of them appear in the same way but in different row as ...
  28. [28]
    [PDF] Anton Webern's concert for 9 instruments op. 24 - Ioannis Mitsialis
    These are the four basic row forms that all twelve-tone composers were using at the period that this work was written. A common compositional practice was ...Missing: sequence | Show results with:sequence
  29. [29]
    Twelve-Tone Anthology – Open Music Theory - VIVA's Pressbooks
    The section after this one deals with retrograde inversion symmetry, and rotational symmetry is included as part of the following sections on derived rows ( ...
  30. [30]
    Self-Similarity and Compositional Strategies in the Music of Milton ...
    The unfolding of a compact algebraic group into a larger structure which exhibits an isomorphic relationship with the smaller group is the essence of.
  31. [31]
    Detail and the Array in Milton Babbitt's "My Complements to Roger"
    equivalent under the four familiar twelve-tone operations: transposition, inversion, and their retrogrades. Set classes are represented by a set matrix ...
  32. [32]
    [PDF] Teaching Inversion through Jean Papineau-Couture's Nuit
    Jan 1, 2011 · Lewin describes a contextually-defined approach to inversion in “inversional Balance as an Organizing Force in Schoenberg's Music and thought,” ...
  33. [33]
    The Structure of All-Interval Series - jstor
    duces itself under retrograde-inversion, since the retrograde operation "inverts" the interval succession. Note that the classical RI-invariance is ruled ...
  34. [34]
    Recognition of melodic transformations: Inversion, retrograde, and ...
    The melodic transformations of inversion, retrograde, and retrograde inversion occur in pieces of music. An important question is whether such manipulation.Missing: registral | Show results with:registral
  35. [35]
    Composition and Context in Twelve-Note Music of Anton Webern
    Thus D1 can be regarded as a registral inversion of D in Ex. 10, F2 as a retrograde of F, and. A3 (see Ex. 14a) as a retrograde inversion of A.
  36. [36]
    [PDF] Seminar Notes: The Mathematics of Music - Yale University
    Sep 1, 2010 · The simplest example of a musical transformation group is D12, whose elements are transformations of the. 12 pitch classes as discussed in the ...
  37. [37]
  38. [38]
  39. [39]
    [PDF] György Ligeti's Cultural Identities - eScholarship.org
    The recursive struc- ture of this motive can be described as a chain ... by retrograde inversion (labelled RI; superscripts denote the index of inversion),.
  40. [40]
    Frans Absil Music | Retrograde-Inversion Chain | RICH Transformation
    The Retrograde-Inversion Chain (RICH) is a pitch transformation creating a longer melody from a short motif, achieving symmetry and internal coherence.
  41. [41]
    [PDF] 6 Algorithmic composition - KARLHEINZ ESSL
    retrograde, inversion and the retrograde of the inversion - represented as a matrix where the note names have been replaced by numbers (as shown in the ...