The Mandolin: Origins, Construction, and Sound

The mandolin combines the shape of a lute, the tuning of a violin, and the pick technique of a plucked instrument in a small package with surprising projection. Its eight strings, grouped in pairs, produce a metallic, glittering sound that stands out in folk ensembles, in chamber music, and in scores by classical composers.

Where the mandolin comes from

The mandolin descends from the mandolino and other small European lutes of the seventeenth and eighteenth centuries, linked to the mandora family. Its modern form, with eight metal strings in four courses, was consolidated in Italy, and the city of Naples gave its name to one of the best-known models. From the nineteenth century on, the instrument spread across Europe and the Americas, finding a place in serenade music, folk music, and later in popular styles in many countries.

Composers such as Vivaldi wrote concertos for the mandolin, and Mozart included it in the opera Don Giovanni, in the protagonist's serenade. Its presence in art music is well documented, though limited compared with that of other stringed instruments.

Structure of the instrument

The body of the mandolin is an acoustic box with a top, back, and sides, like a miniature guitar's. The top, usually made of spruce, has a round or f-shaped sound hole, depending on the style. The neck is long and narrow, with metal frets, and ends in a headstock that holds the tuning machines.

A few components deserve attention:

• Bridge: holds the strings above the top and transmits their vibration to the body.
• Nut: a small piece at the start of the neck that guides the strings and sets the spacing between them.
• Pickguard: a plate that keeps the pick from scratching the top.
• Strings: eight, of steel or bronze, in four pairs.

To understand how each component contributes to projection, the article on acoustic guitar anatomy offers a picture that applies, at a smaller scale, to the mandolin.

Tuning and range

The four courses of paired strings are tuned in perfect fifths, to the same notes as the violin: G, D, A, and E, from lowest to highest, with each pair tuned in unison. The practical consequence is immediate: a violinist who takes up the mandolin already knows how the notes are laid out, and the same fingering patterns for scales work on both instruments, even though the left hand works with frets instead of a smooth fingerboard.

The range runs from the lowest note, the G below middle C, up through more than two octaves in the high register. It is not a bass instrument, but the brightness of its upper notes cuts well through an instrumental texture. To go deeper into how a reference pitch is established, read about musical tuning and the role of reference pitches.

Pick technique and the tremolo

Because metal strings die away quickly after being struck, the mandolin has a physical problem: long notes fade before they are over. The traditional solution is the tremolo, a very fast repetition of the same note, played with alternating up-and-down strokes of the pick. The ear fuses the attacks and perceives a continuous, undulating sound.

Besides tremolo, there is alternate picking for fast runs and arpeggios, and chords played as short, dry strokes, typical of dance styles. Using a pick produces a clear attack and a hint of metallic edge, different from the softer tone of a guitar played with the pads of the fingers. A related instrument, also plucked and short-scaled, appears in the ukulele and its main variations.

Two construction styles

The Neapolitan mandolin has a round back, built from thin strips of wood glued into a bowl shape. The sound is sweet and gentle, and the instrument is relatively light. It spread widely across Europe and suits classical and serenade repertoire well.

The American-style mandolin, developed in the late nineteenth and early twentieth centuries, has a carved, arched top and back, in the manner of a violin, or a flat one. The stiffer construction produces a direct, dry sound with good projection, which stands out in unamplified string bands. The variation is an example of how the structure of the body changes the tone, a theme that the article on what determines an instrument's timbre explains in detail.

Musical role and relatives

In ensembles, the mandolin usually plays the main melody or an ornamental voice. In plectrum orchestras, groups made up of mandolins, mandolas, guitars, and a double bass, it takes on roles similar to those of the violins, divided into parts. Related instruments in larger sizes also exist, such as the mandola and the mandocello, which serve as the viola and cello of the group.

In terms of tone, the mandolin is a good case for comparison with the violin. The difference between a plucked string and a bowed string shows up clearly, and the article on the sound of the violin shows the other side of that comparison.

Caring for metal strings

The eight steel strings add up to considerable tension on a small, light body. For that reason, the mandolin's top is thin and sensitive to changes in humidity and temperature. Leaving the instrument near heat sources or in a closed car can cause cracks and a lifting bridge.

When changing strings, it is wise to replace one pair at a time, so the tension on the neck stays relatively stable. Worn strings lose their brightness and sound dull, and they also make it harder to tune the pairs in unison. Wiping the strings with a dry cloth after playing extends their life, since perspiration from the fingers speeds up corrosion.

Playing styles and repertoire today

Beyond the classical and serenade traditions, the mandolin is a mainstay of many folk and popular styles. In bluegrass, it supplies the rhythmic "chop" on the off-beats as well as fast solos; in Irish and other folk traditions, it doubles fiddle tunes; in Brazilian choro and Italian popular song, it carries lively melodic lines. Its tuning in fifths makes it easy to share repertoire with the violin, and that overlap is one reason players so often move between the two instruments. Whatever the style, the pick, the pairs of strings, and the bright attack remain the same, and they are what make the sound instantly recognizable.

Where to go from here

If you are buying or evaluating a mandolin, look at the construction before the looks: check that the top has no cracks, that the neck is not warped, and that the strings hold their tuning in pairs. A well-adjusted instrument makes it much easier to master the tremolo. To learn about the craft behind this construction, read about the luthier's craft and test your knowledge in the quiz.