Guide
Dynamics and Tempo Markings Explained
How loud and how fast are never absolute - they're relative and relational.
Our glossary lists the individual Italian terms for dynamics and tempo; this page is about how those two categories actually function in practice, which matters more than memorizing the vocabulary.
Dynamics are relative, not absolute
A forte in a Mozart symphony and a forte in a Mahler symphony don't necessarily hit the same volume in absolute terms — dynamics markings describe a level relative to everything else in that specific piece, not a fixed decibel target. A piano passage right after a fortissimo climax will register as quieter than the same marking would in a piece that never gets loud at all. Composers also write crescendo and diminuendo to shape a smooth path between two dynamic levels, rather than jumping abruptly.
Tempo is a target, not a metronome click
A tempo marking like allegro describes a general character and rough speed range rather than one exact number, which is why two different recordings of the same piece, by different performers, can have noticeably different tempos while both being "correct." Since the early 1800s, composers have also been able to specify an exact tempo using a metronome marking (written as, for example, ♩ = 120, meaning 120 quarter-note beats per minute), giving a precise target where a word like allegro alone would leave room for interpretation.
Why this matters for listening
Because both categories leave room for interpretation, the same written score can sound genuinely different in the hands of different performers — part of why our how to choose a recording guide exists at all. Learning to notice where a performer chooses to push tempo, hold back, or shape a crescendo is one of the most direct ways to start hearing interpretation as its own skill, separate from the notes on the page.