Glissando
A captivating musical effect, the glissando allows musicians to effortlessly slide between pitches, creating a sense of motion and drama. From the soaring sweep of a violin to the dazzling cascade of a piano, it adds a unique color to countless compositions. But what exactly makes a glissando distinct from other pitch manipulations, and how do different instruments achieve this remarkable sonic journey? A glissando is fundamentally a musical glide between notes, which can be either a continuous, seamless transition or a rapid succession of discrete pitches. Different instruments require unique techniques to achieve a glissando, from sliding fingers on strings or keys to manipulating embouchure on wind instruments. While often used interchangeably with "portamento," glissando sometimes implies a more distinct, stepped movement, though common usage blurs these definitions in practice.
AI Summary
A captivating musical effect, the glissando allows musicians to effortlessly slide between pitches, creating a sense of motion and drama. From the soaring sweep of a violin to the dazzling cascade of a piano, it adds a unique color to countless compositions. But what exactly makes a glissando distinct from other pitch manipulations, and how do different instruments achieve this remarkable sonic journey?
- A glissando is fundamentally a musical glide between notes, which can be either a continuous, seamless transition or a rapid succession of discrete pitches.
- Different instruments require unique techniques to achieve a glissando, from sliding fingers on strings or keys to manipulating embouchure on wind instruments.
- While often used interchangeably with "portamento," glissando sometimes implies a more distinct, stepped movement, though common usage blurs these definitions in practice.
What is a Glissando?
At its heart, a glissando is a musical term for a 'glide' — a rapid, sweeping movement from one pitch to another. It comes from the Italian 'glissando,' derived from the French word 'glisser,' meaning 'to slide.' It's a fundamental expressive tool that adds fluidity and drama to music.
Sometimes, you'll hear the term 'portamento' used interchangeably with glissando. While some musicians distinguish between them — portamento often implies a continuous, seamless glide, especially in singing or on fretless instruments — glissando can encompass both continuous and discrete, stepped glides, like on a piano.
Beyond these, music has a colorful vocabulary for such slides! You might hear terms like 'slide,' 'sweep bend,' or 'smear.' For a loud, aggressive glissando at the start of a note, there's even 'rip,' and in jazz, a 'lip' refers to a glissando on a wind instrument made by changing your embouchure.
Marking the Glide: Notation
In written music, a glissando is typically indicated by a line extending from the initial note in the desired direction, sometimes wavy, often accompanied by the abbreviation 'gliss.' This simple mark tells a musician to unleash a dynamic slide.
Occasionally, especially for discrete glissandi, a composer might write out all the individual notes in standard notation—like a flurry of semiquavers—and then add the word 'glissando.' This leaves no doubt about the specific notes to be played rapidly in succession.
Discrete Glissandi: Hearing Each Step
On certain instruments, like the piano, harp, or xylophone, a glissando produces a cascade of clearly audible, individual tones. A pianist, for example, can slide their fingernails across the white keys to create a bright C major scale, or across the black keys for an exotic F-sharp major pentatonic scale.
Performing both simultaneously yields a full chromatic scale, a truly dazzling effect. Legendary composers like Maurice Ravel, Sergei Rachmaninoff, and George Gershwin masterfully employed piano glissandi to add brilliance and excitement to their iconic works.
Organists, particularly in contemporary pieces, can create a 'palm glissando.' This involves sweeping the flat of the hand across a wide range of keys at once, generating a dramatic, almost chaotic wall of sound — a truly atonal roar!
Similar to this are 'cluster-glissandos,' famously used by Karlheinz Stockhausen, which give his piano compositions a uniquely intense sonic flavor. Harps also excel at discrete glissandi; a player can slide their finger across the strings to quickly play scales or even complex arpeggios.
Wind, brass, and fretted-stringed instrument players can also approximate discrete glissandi by executing incredibly rapid chromatic scales. Imagine a guitarist sliding a finger quickly up or down a string, blurring the individual notes into a single, sweeping motion.
Continuous Glissandi: The Seamless Slide
Then there are instruments capable of a truly continuous glissando, where the pitch seamlessly shifts without any distinct steps. Think of the mournful slide of a violin, the smooth sweep of a trombone, or the ethereal wail of a theremin.
Other instruments in this category include the viola, cello, double bass, fretless guitars, and stringed instruments with bendable strings like the sitar. Even the human voice is a master of continuous glissando, effortlessly gliding between notes.
Wind instruments, though often limited by keys or valves, can still achieve remarkable continuous slides. A trumpet player might alter lip pressure, while a flutist can combine embouchure changes with rolling the head joint. Even a clarinetist can achieve a slide by slowly lifting fingers off tone holes or manipulating their oral cavity.
Electric guitars equipped with a tremolo arm can also produce a beautiful portamento, bending the pitch up or down smoothly. However, a fascinating example of the continuous vs. discrete debate is the iconic opening of Gershwin's 'Rhapsody in Blue'—originally notated as a stepped glissando, it's almost universally played as a continuous, soulful portamento by the clarinetist.
Beyond the Glissando: Bent Notes
Closely related but distinct from a glissando is a 'bent note.' While a glissando is a journey between pitches, a bent note involves varying the pitch of a single note. On instruments with continuous pitch, like the human voice or a trombone, this is often simply described as a subtle shift in intonation.
On fretted instruments, a note is typically bent higher by physically bending the string with extra finger pressure. Harmonica players bend notes lower by subtly altering their vocal tract to shift the reed's resonance, while brass players use lip pressure to achieve the effect. Even unpitched percussion can 'bend' in pitch, sounding higher with increased dynamics.
Bent notes are a cornerstone of expressive playing, deeply ingrained in the fabric of jazz, blues, and rock music. They add grit, emotion, and a uniquely human quality to the sound, distinguishing these genres with their characteristic vocal-like inflections.
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Glissando
In music, a glissando (Italian: [ɡlisˈsando]; plural: glissandi, abbreviated gliss.) is a glide from one pitch to another (). It is an Italianized musical term derived from the French glisser, "to glide". In some contexts, it is equivalent to portamento, which is a continuous, seamless glide between notes. In other contexts, it refers to discrete, stepped glides across notes, such as on a piano. Some terms that are similar or equivalent in some contexts are slide, sweep bend, smear, rip (for a loud, violent glissando to the beginning of a note), lip (in jazz terminology, when executed by changing one's embouchure on a wind instrument), plop, or falling hail (a glissando on a harp using the back of the fingernails). On wind instruments, a scoop is a glissando ascending to the onset of a note achieved entirely with the embouchure, except on instruments that have a slide (such as a trombone).
Notation
Glissando
Several examples of the musical notation of glissando
The glissando is indicated by following the initial note with a line, sometimes wavy, in the desired direction, often accompanied by the abbreviation gliss.. Occasionally, the desired notes are notated in the standard method (i.e. semiquavers) accompanied by the word 'glissando'.
Discrete glissando
Glissando
On some instruments (e.g., piano, harp, xylophone), discrete tones are clearly audible when sliding. For example, on a keyboard, a player's fingernails can be made to slide across the white keys or over the black keys, producing either a C major scale or an F♯ major pentatonic scale, or their relative modes; by performing both at once, it is possible to produce a full chromatic scale. Maurice Ravel used glissandi in many of his piano compositions, and "Alborada del Gracioso" contains notable piano glissando passages in thirds executed by the right hand. Rachmaninoff, Prokofiev, Liszt and Gershwin have all used glissandi for piano in notable compositions.
Organ players—particularly in contemporary music—sometimes employ an effect known as the palm glissando, where over the course of the glissando the flat of the hand is used to depress a wide area of keys simultaneously, resulting in a dramatic atonal sweep.
A similar device on the piano is cluster-glissandos, used extensively by Karlheinz Stockhausen in Klavierstück X, and which "more than anything else, lend the work its unique aural flavour". On a harp, the player can slide their finger across the strings, quickly playing the scale (or on pedal harp even arpeggios such as C♭–D–E♯–F–G♯–A♭–B). Wind, brass, and fretted-stringed-instrument players can perform an extremely rapid chromatic scale (e.g., sliding up or down a string quickly on a fretted instrument).
Arpeggio effects (likewise named glissando) are also obtained by bowed strings (playing harmonics) and brass, especially the horn.
Continuous glissando
Glissando
Musical instruments with continuously variable pitch are capable of continuous glissando, sometimes called portamento, over a substantial range. These include unfretted chordophones (such as the violin, viola, cello and double bass, and fretless guitars), stringed instruments with a way of stretching the strings (such as the guitar, veena, sitar or pipa), a fretted guitar or lap steel guitar when accompanied with the use of a slide, wind instruments without valves or stops (such as the trombone or slide whistle), timpani (kettledrums), electronic instruments (such as the theremin, the ondes Martenot, synthesizers and keytars), the water organ, and the human voice.
Wind instruments can effect a similar limited slide by altering the lip pressure (on trumpet, for example) or a combination of embouchure and rolling the head joint (as on the flute), while others such as the clarinet can achieve this by slowly dragging fingers off tone holes or changing the oral cavity's resonance by manipulating tongue position, embouchure, and throat shaping.
Many electric guitars are fitted with a tremolo arm which can produce either a portamento, a vibrato, or a combination of both (but not a true tremolo despite the name).
Prescriptive attempts to distinguish the glissando from the portamento by limiting the former to discrete, stepped glides conflict with established usage of the term for instruments like the trombone and timpani. The clarinet gesture that opens Rhapsody in Blue was originally notated as a stepped glissando (Gershwin's score labels each individual note) but is in practice played as a portamento.
Bent note
Glissando
A bent note is a musical note that is varied in pitch. With unfretted strings or other continuous-pitch instruments such as the trombone, or with the human voice, such variation is more properly described in terms of intonation. A note is commonly bent to a higher pitch on fretted instruments literally by bending the string with excess finger pressure, and to a lower pitch on harmonica (a free-reed aerophone) by altering the vocal tract to shift the resonance of the reed. On brass instruments such as the trumpet, the note is bent by using the lip. "Indeterminately pitched instruments [such as unpitched percussion instruments and friction drum rolls]...produce a pitch or pitch spectrum that becomes higher with an increase of dynamic and lower with a decrease of dynamic."
The bent note is commonly found in various forms of jazz, blues, and rock.