Music theory · 6 min read

Dynamics and articulation, explained

Dynamics tell you how loud; articulation tells you how each note starts and stops. What the marks mean, and how bellows and bow actually produce them.

2026-05-11

The dynamic marks and what they actually mean

The core ladder runs pianissimo, piano, mezzo-piano, mezzo-forte, forte, fortissimo, usually printed as pp, p, mp, mf, f and ff. Beyond these you meet ppp and fff, and in a few late Romantic scores even more letters, which is more a sign of a composer's enthusiasm than a genuinely distinguishable level.

The crucial point is that these are relative, not absolute. There is no decibel value for forte. A forte in a solo piece for unaccompanied double bass and a forte in a Mahler symphony are not remotely the same sound. What the marking tells you is where this moment sits within the range of this piece, on this instrument, in this room. Practising a piece at home and then playing it in a hall will change every absolute level while leaving every relationship intact.

Gradual changes carry the real expressive weight. A crescendo, often written as an opening hairpin, means grow louder over a span; a diminuendo or decrescendo means the reverse. The instruction that students most often ignore is the span. A crescendo drawn over eight bars must take eight bars. Arriving at the top in bar two and then sitting there is the single most common dynamic fault in student playing, and it flattens the shape the composer wrote.

Sudden changes have their own vocabulary: subito piano for an abrupt drop, sforzando for a single sharply attacked note, forte-piano for a loud attack that immediately falls away. These are events, not levels, and they need to be startling to work.

Articulation: how the note begins and ends

Articulation is about the edges of notes rather than their volume. Legato, shown by a slur, means each note runs into the next with no gap. Staccato, a dot above or below the notehead, means the note is shortened and separated, typically to about half its written length, though the proportion varies with tempo and style. Tenuto, a short horizontal line, means hold the note for its full value, sometimes with a slight weight on it.

Accent, the wedge pointing right, means attack this note harder than its neighbours. Marcato, the vertical wedge, means both heavier and shorter. Portato, dots under a slur, means slightly separated but within one gesture.

These marks describe a result, not a technique. The same staccato dot is produced by the tongue on a flute, by the bow leaving the string on a double bass, and by the bellows on an accordion. The notation tells you what the listener should hear; working out how to produce it on your instrument is the whole business of technique.

Where the accordion makes its dynamics

This is the fact that reorganises everything for an accordion student: the keys do nothing to the volume. A reed sounds when air passes it, and the amount of air is set entirely by the pressure you apply to the bellows. Striking a key harder achieves nothing except noise from the keybed. All dynamic control lives in the left arm.

The consequence is that dynamics on the accordion are continuous and shared. You cannot play one note loudly and another quietly at the same instant, because a single stream of air feeds every sounding reed. Balancing a melody against an accompaniment has to be done by registration, by texture and by voicing, not by weight of touch.

What you get in return is something a piano cannot do at all: you can shape a note after it has begun. A held chord can swell and fade under your control, exactly as a singer or a string player would shape it. Bellows shake, bellows articulation and the sharp bellows attack known in Russian practice as ricochet are all extensions of this one principle. The bellows are the accordion's breath, and treating them as a lung rather than a pump is the difference between a student and a musician.

Where the double bass makes its dynamics

A bowed string responds to three variables: bow speed, bow weight and the distance of the bow from the bridge. Faster bow with more weight nearer the bridge gives a louder, more focused sound; slower bow with less weight nearer the fingerboard gives a softer, more diffuse one. The three variables are not independent, and learning to trade them against each other is most of what bow technique is.

Articulation comes from how the bow starts the string. A detache stroke gives a clean separate note per bow; a martele stroke begins with a pinch and a release, giving a hard attack and a ring; spiccato lets the bow bounce, giving short notes with air around them. Pizzicato is a different world again, where the flesh of the finger pulling across the string produces a warm note with a fast decay,.

In thumb position, high on the G string, the same forte demands less weight and a bow placement nearer the bridge, because the vibrating length is short and easily crushed. Dynamics are never a single setting; they are a negotiation with the register you are in.

How to practise them

Practise dynamics in relation, never in isolation. Take eight bars and play them at three levels, then check that the quiet version still speaks and the loud version is still in tune. Most students have a narrower dynamic range than they think, and the honest test is a recording.

For articulation, isolate one mark and exaggerate it past the point of good taste, then bring it back. A staccato that is genuinely short teaches your arm what short means; a legato with no seam teaches your ear what a seam sounds like. In our lessons at A&G Academy the first thing we usually ask a student to fix is not the notes but the length of the notes, because that is what makes a phrase sound intended rather than merely correct.

Frequently asked

What is the difference between dynamics and articulation?

Dynamics tell you how loud to play, using marks such as piano, forte and the crescendo hairpin. Articulation tells you how each note starts and stops: joined together under a slur, shortened by a staccato dot, held full length under a tenuto line, or attacked hard under an accent. Volume versus shape.

How do you play loudly and quietly on an accordion?

Entirely with the bellows. Pressing a key harder does nothing, because volume depends only on the air pressure moving past the reed. More pressure from the left arm gives more volume, less gives less, and because you control the air continuously you can swell or fade a note after it has already begun sounding.

Is staccato always the same length?

No. Staccato means detached and shortened, but the proportion depends on tempo, style and instrument. A staccato quaver in a fast Baroque allegro is far shorter relative to the beat than a staccato crotchet in a slow Romantic movement. Treat the dot as an instruction to separate rather than a fixed fraction.


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