Rhythm Rhythm (from Greek µ
, rhythmos, "any regular recurring motion, symmetry" (Liddell and Scott 1996)) generally means a "movement marked by the regulated succession of strong
and weak elements, or of opposite or different conditions" (Anon. 1971, 2537). This general meaning of regular recurrence or pattern in time can apply to a wide variety of cyclical natural phenomena having a periodicity or frequency of anything from microseconds to several seconds (as with the riff in a rock music song); to several minutes or hours, or, at the most extreme, even over many years. In the performance arts, rhythm is the timing of events on a human scale; of musical sounds and silences that occur over time, of the steps of a dance, or the meter of spoken language and poetry. In some performing arts, such as hip hop music, the rhythmic delivery of the lyrics is one of the most important elements of the style. Rhythm may also refer to visual presentation, as "timed movement through space" (Jirousek 1995,) and a common language of pattern unites rhythm with geometry. In recent years, rhythm and meter have become an important area of research among music scholars. Recent work in these areas includes books by Maury Yeston (1976), Fred Lerdahl and Ray Jackendoff (Lerdahl and Jackendoff 1983), Jonathan Kramer, Christopher Hasty (1997), Godfried Toussaint (2005), William Rothstein (1989), and Joel Lester (Lester 1986). In Thinking and Destiny, Harold W. Percival defined rhythm as the character and meaning of thought expressed through the measure or movement in sound or form, or by written signs or Rhythm, a sequence in time repeated, featured in dance: an early moving picture demonstrates the waltz.
words (Percival 1946, 1006).
Contents Anthropology Terminology Pulse, beat and measure Unit and gesture Alternation and repetition Tempo and duration Metric structure Composite rhythm Rhythm notation Educational literature/Advanced training courses African music Indian music Western music Linguistics In popular culture See also References Further reading External links
Anthropology In his television series How Music Works, Howard Goodall presents theories that human rhythm recalls the regularity with which we walk and the heartbeat (Goodall 2006, 0:03:10). Other research suggests that it does not relate to the heartbeat directly, but rather the speed of emotional affect, which also influences heartbeat. Yet other researchers suggest that since certain features of human music are widespread, it is "reasonable to suspect that beat-based rhythmic processing has ancient evolutionary roots" (Patel 2014, 1). Justin London writes that musical metre "involves our initial perception as well as subsequent anticipation of a series of beats that we abstract from the rhythm surface of the music as it unfolds in time" (London 2004, 4). The "perception" and "abstraction" of rhythmic measure is the foundation of human instinctive musical participation, as when we divide a series of identical clock-ticks into "tick-tock-tick-tock" (Scholes 1977b; Scholes 1977c). Joseph Jordania recently suggested that the sense of rhythm was developed in the early stages of hominid evolution by the forces of natural selection (Jordania, 2011 & pg.99-101). Plenty of animals walk rhythmically and hear the sounds of the heartbeat in the womb, but only humans have the ability to be engaged (entrained) in rhythmically coordinated vocalizations and other activities. According to Jordania, development of the sense of rhythm was central for the achievement of the specific neurological state of the battle trance, crucial for the development of the effective defense system of early hominids. Rhythmic war cry, rhythmic drumming by shamans, rhythmic drilling of the soldiers and contemporary professional combat forces listening to the heavy rhythmic rock music (Pieslak 2009,) all use the ability of rhythm to unite human individuals into a shared collective identity where group members put the interests of the group above their individual interests and safety.
Percussion instruments have clearly defined sounds that aid the creation and perception of complex rhythms
Some types of parrots can know rhythm (Anon. 2009). Neurologist Oliver Sacks states that chimpanzees and other animals show no similar appreciation of rhythm yet posits that human affinity for rhythm is fundamental, so that a person's sense of rhythm cannot be lost (e.g. by stroke). "There is not a single report of an animal being trained to tap, peck, or move in synchrony with an auditory beat" (Patel 2006, cited in Sacks 2007, 239–40, who adds, "No doubt many pet lovers will dispute this notion, and indeed many animals, from the Lippizaner horses of the Spanish Riding School of Vienna to performing circus animals appear to 'dance' to music. It is not clear whether they are doing so or are responding to subtle visual or tactile cues from the humans around them.") Human rhythmic arts are possibly to some extent rooted in courtship ritual (Mithen 2005,).
A simple [quadr]duple drum pattern, which lays a foundation of duration common in popular music: Play .
The establishment of a basic beat requires the perception of a regular sequence of distinct short-duration pulses and, as a subjective perception of loudness is relative to background noise levels, a pulse must decay to silence before the next occurs if it is to be really distinct. For this reason, the fast-transient sounds of percussion instruments lend themselves to the definition of rhythm. Musical cultures that rely upon such instruments may develop multi-layered polyrhythm and simultaneous rhythms in more than one time signature, called polymeter. Such are the cross-rhythms of Sub-Saharan Africa and the interlocking kotekan rhythms of the gamelan. For information on rhythm in Indian music see Tala (music). For other Asian approaches to rhythm see Rhythm in Persian music, Rhythm in Arabian music and Usul—Rhythm in Turkish music and Dumbek rhythms.
Terminology
Compound triple drum pattern: divides three beats into three. Play Contains repetition on three levels.
Pulse, beat and measure (See main articles; Pulse (music), Beat (music)) Most music, dance and oral poetry establishes and maintains an underlying "metric level", a basic unit of time that may be audible or implied, the pulse or tactus of the mensural level (Berry 1987, 349; Lerdahl and Jackendoff 1983; Fitch and Rosenfeld 2007, 44), or beat level, sometimes simply called the beat. This consists of a (repeating) series of identical yet distinct periodic short-duration stimuli perceived as points in time (Winold 1975, 213). The "beat" pulse is not necessarily the fastest or the slowest component of the rhythm but the one that is perceived as fundamental: it has a tempo to which listeners entrain as they tap their foot or dance to a piece of music (Handel 1989). It is currently most often designated as a crotchet or quarter note in western notation (see time signature). Faster levels are division levels, and slower levels are multiple levels (Winold 1975, 213). Maury Yeston clarified "Rhythms of recurrence" arise from the interaction of two levels of motion, the faster providing the pulse and the slower organizing the beats into repetitive groups (Yeston 1976, 50–52). "Once a metric hierarchy has been established, we, as listeners, will maintain that organization as long as minimal evidence is present" (Lester 1986, 77).
Metric levels: beat level shown in middle with division levels above and multiple levels below.
Unit and gesture A durational pattern that synchronises with a pulse or pulses on the underlying metric level may be called a rhythmic unit. These may be classified as; metric—even patterns, such as steady eighth notes or pulses—intrametric—confirming patterns, such as dotted eighth-sixteenth note and swing patterns—contrametric—non-confirming, or syncopated patterns and extrametric—irregular patterns, such as tuplets. A rhythmic gesture is any durational pattern that, in contrast to the rhythmic unit, does not occupy a period of time equivalent to a pulse or pulses on an underlying metric level. It may be described according to its beginning and ending or by the rhythmic units it contains. Beginnings on a strong pulse are thetic, a weak pulse, anacrustic and those beginning after a rest or tied-over note are called initial rest. Endings on a strong pulse are strong, a weak pulse, weak and those that end on a strong or weak upbeat are upbeat (Winold 1975, 239). Rhythmic units: division level shown above and rhythmic units shown below Play .
Alternation and repetition Rhythm is marked by the regulated succession of opposite elements, the dynamics of the strong and weak beat, the played beat and the inaudible but implied rest beat, the long and short note. As well as perceiving rhythm we must be able to anticipate it. This depends on repetition of a pattern that is short enough to memorize.
The alternation of the strong and weak beat is fundamental to the ancient language of poetry, dance and music. The common poetic term "foot" refers, as in dance, to the lifting and tapping of the foot in time. In a similar way musicians speak of an upbeat and a downbeat and of the "on" and "off" beat. These contrasts naturally facilitate a dual hierarchy of rhythm and depend on repeating patterns of duration, accent and rest forming a "pulse-group" that corresponds to the poetic foot. Normally such pulse-groups are defined by taking the most accented beat as the first and counting the pulses until the next accent (MacPherson 1930, 5; Scholes 1977b). A rhythm that accents another beat and de-emphasises the downbeat as established or assumed from the melody or from a preceding rhythm is called syncopated rhythm. Normally, even the most complex of meters may be broken down into a chain of duple and triple pulses (MacPherson 1930, 5; Scholes 1977b) either by addition or division. According to Pierre Boulez, beat structures beyond four, in western music, are "simply not natural" (Slatkin n.d., at 5:05).
Tempo and duration (See main articles; Duration (music), Tempo) The tempo of the piece is the speed or frequency of the tactus, a measure of how quickly the beat flows. This is often measured in 'beats per minute' (bpm): 60 bpm means a speed of one beat per second, a frequency of 1 Hz. A rhythmic unit is a durational pattern that has a period equivalent to a pulse or several pulses (Winold 1975, 237). The duration of any such unit is inversely related to its tempo. Musical sound may be analyzed on five different time scales, which Moravscik has arranged in order of increasing duration (Moravcsik 2002, 114). Supershort: a single cycle of an audible wave, approximately 1⁄30–1⁄10,000 second (30–10,000 Hz or more than 1,800 bpm). These, though rhythmic in nature, are not perceived as separate events but as continuous musical pitch. Short: of the order of one second (1 Hz, 60 bpm, 10–100,000 audio cycles). Musical tempo is generally specified in the range 40 to 240 beats per minute. A continuous pulse cannot be perceived as a musical beat if it is faster than 8–10 per second (8–10 Hz, 480–600 bpm) or slower than 1 per 1.5–2 seconds (0.6–0.5 Hz, 40–30 bpm). Too fast a beat becomes a drone, too slow a succession of sounds seems unconnected (Fraisse 1956; Woodrow 1951, both quoted in Covaciu-Pogorilowski n.d.). This time-frame roughly corresponds to the human heart rate and to the duration of a single step, syllable or rhythmic gesture. Medium: ≥ few seconds, This median durational level "defines rhythm in music" (Moravcsik 2002, 114) as it allows the definition of a rhythmic unit, the arrangement of an entire sequence of accented, unaccented and silent or "rest" pulses into the cells of a measure that may give rise to the "briefest intelligible and self-existent musical unit" (Scholes 1977c), a motif or figure. This may be further organized, by repetition and variation, into a definite phrase that may characterise an entire genre of music, dance or poetry and that may be regarded as the fundamental formal unit of music (MacPherson 1930,). Long: ≥ many seconds or a minute, corresponding to a durational unit that "consists of musical phrases" (Moravcsik 2002, 114)—which may make up a melody, a formal section, a poetic stanza or a characteristic sequence of dance moves and steps. Thus the temporal regularity of musical organisation includes the most elementary levels of musical form (MacPherson 1930, 3). Very long: ≥ minutes or many hours, musical compositions or subdivisions of compositions. Curtis Roads (Roads 2001) takes a wider view by distinguishing nine-time scales, this time in order of decreasing duration. The first two, the infinite and the supra musical, encompass natural periodicities of months, years, decades, centuries, and greater, while the last three, the sample and subsample, which take account of digital and electronic rates "too brief to be properly recorded or perceived", measured in millionths of seconds (microseconds), and finally the infinitesimal or infinitely brief, are again in the extra-musical domain. Roads' Macro level, encompassing "overall musical architecture or form" roughly corresponds to Moravcsik's "very long" division while his Meso level, the level of "divisions of form" including movements, sections, phrases taking seconds or minutes, is likewise similar to Moravcsik's "long" category. Roads' Sound object (Schaeffer 1959; Schaeffer 1977): "a basic unit of musical structure" and a generalization of note (Xenakis' mini structural time scale); fraction of a second to several seconds, and his Microsound (see granular synthesis) down to the threshold of audible perception; thousands to millionths of seconds, are similarly comparable to Moravcsik's "short" and "supershort" levels of duration.
Metric structure (See main articles; Metre (music), Bar (music), Metre (poetry)) The study of rhythm, stress, and pitch in speech is called prosody (see also: prosody (music)): it is a topic in linguistics and poetics, where it means the number of lines in a verse, the number of syllables in each line and the arrangement of those syllables as long or short, accented or unaccented. Music inherited the term "meter or metre" from the terminology of poetry (Scholes 1977b; Scholes 1977c; Latham 2002). Notation of a clave rhythm pattern: Each cell of the grid corresponds to a fixed duration of time with a resolution fine enough to capture the timing of the pattern, which may be counted as two bars of four beats in divisive (metrical or symmetrical) rhythm, each beat divided into two cells. The first bar of the pattern may also usefully be counted additively (in measured or asymmetrical rhythm) as 3 + 3 + 2.
The metric structure of music includes meter, tempo and all other rhythmic aspects that produce temporal regularity against which the foreground details or durational patterns of the music are projected (Winold 1975, 209-10). The terminology of western music is notoriously imprecise in this area (Scholes 1977b). MacPherson 1930, 3 preferred to speak of "time" and "rhythmic shape", Imogen Holst (Holst 1963, 17) of "measured rhythm". Dance music has instantly recognizable patterns of beats built upon a characteristic tempo and measure. The Imperial Society of Teachers of Dancing defines the tango, for example, as to be danced in 24 time at approximately 66 beats per minute. The basic slow step forwards or backwards, lasting for one beat, is called a "slow", so that a full "right–left" step is equal to one 24 measure (Imperial Society of Teachers of Dancing 1977,) (See Rhythm and dance). The general classifications of metrical rhythm, measured rhythm, and free rhythm may be distinguished
(Cooper 1973, 30). Metrical or divisive rhythm, by far the most common in Western music calculates each time value as a multiple or fraction of the beat. Normal accents re-occur regularly providing systematical grouping (measures). Measured rhythm (additive rhythm) also calculates each time value as a multiple or fraction of a specified time unit but the accents do not recur regularly within the cycle. Free rhythm is where there is neither (Cooper 1973, 30), such as in Christian chant, which has a basic pulse but a freer rhythm, like the rhythm of prose compared to that of verse (Scholes 1977c). See Free time (music). Finally some music, such as some graphically scored works since the 1950s and non-European music such as Honkyoku repertoire for shakuhachi, may be considered ametric (Karpinski 2000, 19). Senza misura is an Italian musical term for "without meter", meaning to play without a beat, using time to measure how long it will take to
Notation of three measures of a clave pattern preceded by one measure of steady quarter notes. This pattern is noted in double time relative to the one above, in one instead of two four-beat measures Four beats followed by three Clave patterns .
play the bar (Forney and Machlis 2007).
Composite rhythm A composite rhythm is the durations and patterns (rhythm) produced by amalgamating all sounding parts of a musical texture. In music of the common practice period, the composite rhythm usually confirms the meter, often in metric or even-note patterns identical to the pulse on a specific metric level. White defines composite rhythm as, "the resultant overall rhythmic articulation among all the voices of a contrapuntal texture" (White 1976, 136.). This concept was concurrently defined as “attack point rhythm” by Maury Yeston in 1976 as “the extreme rhythmic foreground of a composition – the absolute surface of articulated movement” (Yeston 1976, 41-42).
Rhythm notation
Bach's Sinfonia in F minor BWV 795, mm. 1-3 Play original Play with composite .
Worldwide there are many different approaches to passing on rhythmic phrases and patterns, as they exist in traditional music, from generation to generation.
Educational literature/Advanced training courses In the western academic world several schools and training courses have been developed since the 1960s according to national tradition and educational policy. Amongst the few methods and learning programmes for music colleges, universities and conservatoires that are employed on an international scale it is worthy mentioning the following books: Maat en Ritme, by Horst F. Van Der (1963), published by (https://www.broekmans.com/NL/Bladmuziek/Resultaat)Broekmans & Van Poppel, ISBN 9789491906008. A collection of graded exercises in two volumes, from elementary to advanced level. Die Kunst des Rhythmus, by Peter Giger (1993), published by Schott (https://de.schott-music.com/shop/die-kunst-des-rhythmus.html), ISBN 978-3-7957-1862-6. A theoretical approach to western and non-western rhythms. Rhythm to go, by John Palmer (2013), published by Vision Edition (https://visionedition.com/index.php/en/rhythm-to-go) and distributed by CE Books (http://composersedition.com/john-palmer-rhythm-to-go), ISMN 979-0-9002315-1-2. A fast-track collection of graded exercises from elementary to advanced level divided in four sections and including an additional chapter with rhythmic structures used in contemporary music.
African music In the Griot tradition of Africa everything related to music has been passed on orally. Babatunde Olatunji (1927–2003) developed a simple series of spoken sounds for teaching the rhythms of the hand-drum, using six vocal sounds, "Goon, Doon, Go, Do, Pa, Ta", for three basic sounds on the drum, each played with either the left or the right hand. The debate about the appropriateness of staff notation for African music is a subject of particular interest to outsiders while African scholars from Kyagambiddwa to Kongo have, for the most part, accepted the conventions and limitations of staff notation, and produced transcriptions to inform and enable discussion and debate (Agawu 2003, 52). John Miller Chernoff 1979 has argued that West African music is based on the tension between rhythms, polyrhythms created by the simultaneous sounding of two or more different rhythms, generally one dominant rhythm interacting with one or more independent competing rhythms. These often oppose or complement each other and the dominant rhythm. Moral values underpin a musical system based on repetition of relatively simple patterns that meet at distant cross-rhythmic intervals and on call-and-response form. Collective utterances such as proverbs or lineages appear either in phrases translated into "drum talk" or in the words of songs. People expect musicians to stimulate participation by reacting to people dancing. Appreciation of musicians is related to the effectiveness of their upholding community values (Chernoff 1979).
Indian music Indian music has also been passed on orally. Tabla players would learn to speak complex rhythm patterns and phrases before attempting to play them. Sheila Chandra, an English pop singer of Indian descent, made performances based on her singing these patterns. In Indian Classical music, the Tala of a composition is the rhythmic pattern over which the whole piece is structured.
Western music
A Griot performs at Diffa, Niger, West Africa. The Griot is playing a Ngoni or Xalam.
In the 20th century, composers like Igor Stravinsky, Béla Bartók, Philip Glass, and Steve Reich wrote more rhythmically complex music using odd meters, and techniques such as phasing and additive rhythm. At the same time, modernists such as Olivier Messiaen and his pupils used increased complexity to disrupt the sense of a regular beat, leading eventually to the widespread use of irrational rhythms in New Complexity. This use may be explained by a comment of John Cage's where he notes that regular rhythms cause sounds to be heard as a group rather than individually; the irregular rhythms highlight the rapidly changing pitch relationships that would otherwise be subsumed into irrelevant rhythmic groupings (Sandow 2004, 257). LaMonte Young also wrote music in which the sense of a regular beat is absent because the music consists only of long sustained tones (drones). In the 1930s, Henry Cowell wrote music involving multiple simultaneous periodic rhythms and collaborated with Léon Thérémin to invent the Rhythmicon, the first electronic rhythm machine, in order to perform them. Similarly, Conlon Nancarrow wrote for the player piano.
Linguistics In linguistics, rhythm or isochrony is one of the three aspects of prosody, along with stress and intonation. Languages can be categorized according to whether they are syllable-timed, mora-timed, or stress-timed. Speakers of syllabletimed languages such as Spanish and Cantonese put roughly equal time on each syllable; in contrast, speakers of stressed-timed languages such as English and Mandarin Chinese put roughly equal time lags between stressed syllables, with the timing of the unstressed syllables in between them being adjusted to accommodate the stress timing. Narmour 1977 (cited in Winold 1975,) describes three categories of prosodic rules that create rhythmic successions that are additive (same duration repeated), cumulative (short-long), or countercumulative (long-short). Cumulation is associated with closure or relaxation, countercumulation with openness or tension, while additive rhythms are open-ended and repetitive. Richard Middleton points out this method cannot account for syncopation and suggests the concept of transformation (Middleton 1990,).
In popular culture In day-to-day, figurative language, there are several non-music related uses of the word "rhythm". For example, a person may describe the rhythm of the workday in a certain company or occupation, or the rhythm of life in a certain country or region. In these contexts, the meaning of rhythm is often confused with the concept of "tempo", with people erroneously referring to a certain rhythm as being "slow" or "fast". Speed (tempo) cannot be a specification for a certain rhythm, as the same rhythm can occur at any tempo. A certain tempo compares to other tempi by the difference in speed, whereas a certain rhythm compares to other rhythms by the difference in structure.
See also Meter (music) Drumming Polyrhythm Cross-beat
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Knopf. ISBN 978-1-4000-4081-0. Sandow, Greg (2004). "A Fine Madness". In The Pleasure of Modernist Music: Listening, Meaning, Intention, Ideology, edited by Arved Mark Ashby, 253–58. ISBN 1-58046-143-3. Reprinted from The Village Voice (16 March 1982). Scholes, Percy (1977a). "Form", in The Oxford Companion to Music, 6th corrected reprint of the 10th ed. (1970), revised and reset, edited by John Owen Ward. London and New York: Oxford University Press. ISBN 0-19-311306-6. Scholes, Percy (1977b). "Metre", in The Oxford Companion to Music, 6th corrected reprint of the 10th ed. (1970), revised and reset, edited by John Owen Ward. London and New York: Oxford University Press. ISBN 0-19-311306-6. Scholes, Percy (1977c). "Rhythm", in The Oxford Companion to Music, 6th corrected reprint of the 10th ed. (1970), revised and reset, edited by John Owen Ward. London and New York: Oxford University Press. ISBN 0-19-311306-6. Slatkin, Leonard. n.d. "Discovering Music: Rhythm (https://web.archive.org/web/20080216021405/http://www.bbc.co.uk/radio3/discoveringmusic/ram/cdm0401slat1of4.ram) with Leonard Slatkin". Toussaint, Godfried T., “The Geometry of Musical Rhythm,” In J. Akiyama, M. Kano, and X. Tan, editors, Proceedings of the Japan Conference on Discrete and Computational Geometry, Vol. 3742, Lecture Notes in Computer Science, Springer, Berlin/Heidelberg, 2005, pp. 198–212. White, John D. (1976). The Analysis of Music. Englewood Cliffs, NJ: Prentice-Hall. ISBN 0-13-033233-X. Winold, Allen (1975). "Rhythm in Twentieth-Century Music". In Aspects of Twentieth-Century Music, edited by Gary Wittlich, pp. 208-269. Englewood Cliffs, New Jersey: Prentice-Hall. ISBN 0-13-049346-5. Woodrow, Herbert. "Time Perception". In A Handbook of Experimental Psychology, edited by Stanley Smith Stevens,. New York: Wiley, 1951. Yeston, Maury. 1976. The Stratification of Musical Rhythm. New Haven and London: Yale University Press. 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Further reading Honing, H (2002). "Structure and interpretation of rhythm and timing" (http://www.hum.uva.nl/mmm/abstracts/mmm-TvM.html). Tijdschrift voor Muziektheorie [Dutch Journal of Music Theory]. 7 (3): 227–232. Humble, M. (2002). The Development of Rhythmic Organization in Indian Classical Music (https://www.scribd.com/doc/25227226/The-Development-of-Rhythmic-Organization-in-Indian-Classical-Music), MA dissertation, School of Oriental and African Studies, University of London. Lewis, Andrew (2005). Rhythm—What it is and How to Improve Your Sense of It. San Francisco: RhythmSource (http://rhythmsource.com/dev/books/) Press. ISBN 978-0-9754667-0-4. Williams, C. F. A., The Aristoxenian Theory of Musical Rhythm, (Cambridge Library Collection—Music), Cambridge University Press; first edition, 2009.
External links 'Rhythm of Prose', William Morrison Patterson ,Columbia University Press 1917 (https://archive.org/stream/rhythmofproseexp00pattiala/rhythmofproseexp00pattiala_djvu.txt) Melodyhound has a "Query by Tapping" search that allows users to identify music based on rhythm (http://www.melodyhound.com/query_by_tapping.0.html) Louis Hébert, "A Little Semiotics of Rhythm. Elements of Rhythmology", in Signo (http://www.signosemio.com/semiotics-of-rhythm.asp) Retrieved from "https://en.wikipedia.org/w/index.php?title=Rhythm&oldid=829253864"
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