What is interpretation?
A score shows pitch and rhythm, plus some signs. It cannot show everything. The performer decides the rest: exact loudness, speed, touch, tone and shape. These decisions are the interpretation.
A good interpretation is faithful (it follows the composer's signs and the style of the time) and personal (it has the performer's own feeling). Two great performances of one piece can sound quite different.
The expressive tools: dynamics, tempo, articulation, phrasing
Dynamics
pp (pianissimo, very soft), p (piano, soft), mp, mf (medium), f (forte, loud), ff (fortissimo, very loud). Crescendo (<) = gradually louder; diminuendo or decrescendo (>) = gradually softer. Accent (> over a note) = stress one note.
Tempo
Largo/Adagio (slow), Andante (walking), Moderato, Allegro (fast), Presto (very fast). It is often given in beats per minute (bpm). Ritardando = slowing down; accelerando = speeding up. Rubato = flexible time: borrowing a little time and giving it back for expression.
Articulation
Legato (smooth, joined, marked with a slur), staccato (short, detached, dot above the note), tenuto (full length, slight weight).
Phrasing and tone colour
A phrase is a musical sentence, often 2 or 4 bars. Shape it: grow towards the high point, relax at the end, breathe between phrases. Tone colour (timbre) also changes: bright, dark, warm, thin.
Repertoire, style and justifying choices
Repertoire is the set of pieces a musician can perform, solo and in a group, from early music to today. Each style has habits: Baroque music (about 1600–1750) uses terraced dynamics and clear ornaments; Romantic music (1800s) uses big dynamic swells and rubato; jazz swings and improvises; Indian classical music builds a raga from slow alap to fast sections.
To justify a choice, link it to evidence: a sign in the score, the style of the time, the words of a song, the structure (for example, softer when the theme returns quietly), or the mood you want. Example: "I slowed slightly at bar 8 because it is the end of the first section and the harmony comes home."
Transposition, improvisation and learning a piece in time
Transposition moves every note up or down by the same interval. The tune keeps its shape but sits higher or lower, so it suits a voice or an instrument (for example, a clarinet in B♭ reads music a tone higher than it sounds).
Improvisation is creating music on the spot within rules: a scale or raga, a chord pattern, a rhythm. Start small: change the rhythm of a tune, then add a few notes from the same scale.
Learning a piece in a set time: listen and study the score; mark the phrases, the dynamics and the hard bars; practise hard bars slowly in small chunks; build up tempo with a metronome; then play it through and record yourself to check your interpretation.
Key formulas and definitions
- pp < p < mp < mf < f < ff (soft → loud)
- Largo < Adagio < Andante < Moderato < Allegro < Presto (slow → fast)
- Beat length (s) = 60 ÷ bpm
- Legato = smooth, joined; Staccato = short, detached
- Transpose = move every note by the same interval
Worked examples
1. A lullaby is marked p, Andante, legato. Describe how to play it.
Softly, at a calm walking pace, with notes joined smoothly. Shape each phrase gently and let the last note fade.
2. A march is marked f, Allegro, with staccato notes. Why do these choices fit?
A march needs a strong, steady, lively feeling for walking in step: loud dynamics give energy, a fast tempo drives forward, and short notes make a crisp, clear beat.
3. At 120 bpm, how long is each beat?
60 ÷ 120 = 0.5 s.
4. A tune goes C D E C. Transpose it up a whole tone.
Each note moves up two semitones: D E F♯ D. The shape is the same.
5. Write a justification for a crescendo in bars 5–8 of a song whose words build to "at last I'm home".
I grow louder through bars 5–8 because the words build to their most important line, and the melody rises to its highest note there. The crescendo helps the listener feel the arrival.
Common mistakes
- Playing every note at the same loudness. Music without dynamic shape sounds flat.
- Using rubato without giving the time back, so the beat falls apart.
- Ignoring the style: big Romantic rubato in a Baroque dance sounds out of place.
- Giving no reason for a choice. In exams, every interpretation choice should be linked to the score, style or mood.