Every sound event has its unique duration, which we perceive as being either short or long, depending on the context. Several durations, one after another, create the rhythm of a piece.
Elements of Music
Rhythm
All music involves the unfolding of sounds in time. Some of the terminology used in describing music therefore refers to the durational and temporal organization of musical sounds. The attack points of a sequence of sounds produce
rhythm . The three syllables of the word “strawberry” can be pronounced at evenly spaced intervals (straw-ber-ry), or the first syllable can be stretched out, producing one long and two shorter durations (straaaaw-ber-ry)—two different speech rhythms. The speech rhythm of “My country, ‘tis of thee” moves in evenly spaced syllables up to “tis,” which is elongated, followed by “of,” which is cut short and leads directly to “thee”—ta ta ta taaa t-ta. In both vocal and instrumental music, rhythm is generated by the onset of new sounds, whether the progression from one word or syllable to the next in a song, the succession of pitches of a violin melody, the striking of a drum, or the strumming of chords on a guitar.
Meter
The succession of attacks and durations that produces rhythm may proceed in a quite unpredictable flow (“to be or not to be, that is the question”—the opening of Hamlet’s soliloquy)—what is called
nonmetered or
free rhythm —or may occur so as to create an underlying
pulse or
beat (“bubble, bubble, toil and trouble”—four beats coinciding with buh–buh–toil–truh—from the witches’ incantation in Macbeth ). Recurrent groupings of beats by two’s, three’s, or some combination of two’s and three’s, produces
meter. The first beat of each metric group is often described as accented to characterize its defining function in the rhythmic flow (
My country
‘tis of thee,
sweet land of
li berty,
of thee I
sing —six groups of three beats, each beginning with the underlined syllable).
Another important rhythmic phenomenon is
syncopation , which signifies irregular or unexpected stresses in the rhythmic flow (for example, straw-
ber -ry instead of
straw -ber-ry). A distinctive sequence of longs and shorts that recurs throughout an individual work or groups of works, such as particular dance types, is called a
rhythmic pattern ,
rhythmic figure, or
rhythmic motive .
Pitch
Pitch refers to the location of a musical sound in terms of low or high. As we have seen, in terms of the physics of sound, pitch is determined by frequency, or the number of vibrations per second: the faster a sounding object vibrates, the higher its pitch.
Although the audible range of frequencies for human beings is from about 20 to under 20,000 vibrations per second, the upper range of musical pitches is only around 4,000 from high to low as well). Each element of a scale is called a “step” and the distance between steps is called an
interval . Most Western European music is based on
diatonic scales—seven- tone scales comprised of five “whole steps” (moderate-size intervals) and two “half steps” (small intervals). The position of the whole and half steps in the ascending ladder of tones determines the
mode of the scale. Major and minor are two commonly encountered modes, but others are used in folk music, in Western European music before 1700, and in jazz. Another important scale type particularly associated with music from China, Japan, Korea, and other Asian cultures is
pentatonic , a five-note scale comprised of three whole steps and two intervals of a step and a half.
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Source:
OpenStax, Music appreciation: its language, history and culture. OpenStax CNX. Jun 03, 2015 Download for free at https://legacy.cnx.org/content/col11803/1.1
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