Dynamics in music: how loud, and how the note is played

The scale is built from two Italian words: piano (soft) and forte (loud). Everything else is a modification of those two.

ppp and pp — very soft, at the edge of audibility. p — soft. mp (mezzo-piano) — moderately soft. mf (mezzo-forte) — moderately loud. f — loud. ff and fff — very loud.

There is no decibel value behind any of them. A forte for solo flute and a forte for full orchestra differ by an enormous margin, and both are correct: the marking is relative to the instrument, the room and the passage around it.

Two marks handle change over time. Crescendo (cresc., or the opening hairpin) means grow louder; diminuendo or decrescendo (dim., closing hairpin) means grow quieter.

The hairpin's length tells you how long the change takes — that is the whole point of drawing it rather than writing a word. A hairpin stretched over eight bars is a different instruction from one squeezed into a beat, even though both say the same thing.

Two more terms handle sudden change: sforzando (sfz) is a sharp accent on a single note, and subito means immediately — subito piano after a loud passage is one of the most reliable effects in music precisely because it refuses the gradual approach.

Articulation is about the note's edges rather than its volume.

Staccato — a dot above or below the note head — means detached: play the note short, leaving silence before the next. Legato — a slur, the curved line joining different pitches — means connected: no gap at all, each note running into the next.

Tenuto — a short horizontal line — means hold the note its full value, often with a slight emphasis. The accent mark, a sideways wedge, means attack this note harder than its neighbours. Marcato, the vertical wedge, is stronger still.

⚠️ A slur and a tie look almost identical and mean different things. A tie joins two notes of the SAME pitch into one longer sound; a slur joins notes of DIFFERENT pitches and asks for smooth connection. Checking whether the two note heads sit on the same line is the whole test.

Printed music standardised in seventeenth-century Italy, and the vocabulary travelled with the notation. That is also why tempo markings — allegro, andante — come from the same language: both were part of the same package of instructions publishers adopted.

Later composers wrote in their own languages when they wanted precision beyond the convention: Mahler's German directions and Debussy's French ones are famously specific. But the Italian core stayed, because it was already understood everywhere.

A dynamic marking applies from where it appears until the next one replaces it. If a passage is marked p and nothing else appears for sixteen bars, all sixteen bars are soft.

Markings below the staff belong to the left hand in piano music; markings above belong to the right, or to the whole ensemble in a score. When a single marking sits between two staves, it applies to both.

The most common mistake is treating dynamics as decoration to be added once the notes are learned. In practice the opposite works better: playing a passage at its marked dynamic from the first attempt teaches the hand a different physical gesture, and relearning that later takes longer than learning it right.

Beyond the individual note, dynamics shape the form of a piece. A movement that begins pp, reaches ff two thirds through and returns to pp has a shape the listener follows without naming it.

This is also why a score with no dynamics at all — much early music was written that way — is not silent on the question. It leaves the decision to the performer, and performance practice fills in what the page omits.