'Discrete Glissando'
On some instruments (e.g., piano, harp, xylophone), discrete tones are clearly audible when sliding. For example, on a keyboard, a player's fingertips 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 (or their relative modes); or, by performing both at once, it is possible to produce a full chromatic scale, but this is difficult. 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 and brass, especially the horn.
Maurice Ravel's piece Alborada del Gracioso contains notable piano glissando passages in thirds executed by the right hand.
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