Dynamic regulators: crescendo and decrescendo on the guitar

The change you don't see coming

In the previous post we learned the instantaneous dynamic markings: forte, piano, sforzando. These are sudden changes, like switching a light on or off. But music can also change intensity gradually — as if someone were slowly turning a volume knob.

That gradual change is one of the most powerful effects in tonal music. A phrase that grows little by little builds an accumulated tension the listener feels in their body before processing it in their mind. A phrase that slowly fades can create a sense of distance, of something receding or dissolving. Composers know this, which is why they developed specific tools to notate it in the score.

Crescendo and decrescendo

Crescendo (from the Italian crescere, to grow) indicates a gradual increase in intensity. In the score it is represented by the graphic symbol known as the hairpin open: two lines that start from a point and open to the right, like a wedge. It can also be written as the abbreviation cresc.

Decrescendo (also called diminuendo, from the Italian diminuire, to diminish) indicates a gradual reduction in intensity. Its symbol is the inverse: two lines that converge toward the right, closing to a point. The abbreviations decresc. and dim. are equally valid.

Both symbols are, in essence, volume arrows. The crescendo points toward sound; the decrescendo, toward silence.

The length of the hairpin matters

Unlike instantaneous markings (f, p, sfz), hairpins have duration. They extend over one or several notes, and that extension defines the speed of the dynamic change.

A short hairpin — spanning two or three notes — indicates a sudden but gradual change: a jolt of intensity, not an instantaneous leap. A long hairpin — extending across several measures — indicates a slow, sustained growth or descent, sometimes almost imperceptible note by note but devastatingly effective in the overall arc of the phrase.

The start and end of the hairpin are also information. If the crescendo begins at p and ends where a f marking appears, the instruction is clear: grow from soft to loud in that space. If there is no marking at the end, the performer must judge what level of intensity fits the context.

Crescendo on the guitar: the technical challenge

Executing a convincing crescendo on the guitar is harder than it looks. The reason is sustain: every note you play begins to decay immediately after the attack. You cannot raise the volume of a note that has already sounded; you can only control the volume of the note you are about to play.

This means that a crescendo on guitar is not a continuous process but a succession of progressively more intense attacks. The listener perceives the sensation of growth because each new attack is slightly louder than the previous one, and the brain connects those points into an imaginary ascending line.

The technique for achieving this on the classical guitar combines several factors: greater finger speed on the attack, deeper plucking, a gradual shift toward the bridge (for more brightness and projection), and increased muscular tension in the right hand. None of these changes should be abrupt: they must happen in a coordinated and gradual way.

Decrescendo: learning to let go

For many guitarists, the decrescendo is even harder than the crescendo. Diminishing gradually requires a progressive relaxation of the attack that goes against the natural instinct to play with force in order to project sound.

The most expressive decrescendos on the guitar frequently end in pp or ppp, almost at the threshold of audibility. Getting there without losing the clarity of the notes — without the sound becoming muffled or pulseless — is one of the most refined technical and musical challenges the instrument offers.

Andrés Segovia was famous for his decrescendos. In his recordings, some phrases fade until they nearly disappear, yet every note remains perfectly articulated. That combination of softness and clarity is the mark of a mature technique.

Crescendo and decrescendo combined: the dynamic arc

In the guitar repertoire, crescendo and decrescendo rarely appear in isolation. The most common pattern is to find them combined in what theorists call a dynamic arc: a phrase that grows to a point of maximum tension and then descends toward resolution.

This arc might span four measures or forty. It might be clearly marked in the score or merely suggested by the harmony and melodic structure. In either case, the performing guitarist must build it with intention: knowing where the peak is, how much time there is to get there, and how to pace the growth so that arrival at the climax feels neither premature nor overdue.

A final note on notation

In modern scores, graphic hairpins are the standard and universal notation. Written abbreviations (cresc., dim.) are older and appear frequently in eighteenth and nineteenth century repertoire, especially in urtext editions and manuscript facsimiles.

When reading classical guitar scores — Sor, Giuliani, Tárrega — you will find both conventions, sometimes mixed. There is no difference in meaning: a cresc. and an opening hairpin say exactly the same thing.

In the next post we will go deeper into another layer of expressive detail: articulations. Legato, staccato, accent, and tenuto are the instructions that tell the guitarist not just how much volume to use, but how to attack and release each individual note.

The crescendo is the breath of music: without it, the phrase does not live — it merely exists. — Pablo Casals