chromatic scale
A scale that moves only by half steps, using all 12 different pitches before reaching the octave.
half step
The smallest distance between two notes on a keyboard, from one key to the very next key, black or white.
grave
Very slow and serious (say GRAH-vay).
prestissimo
As fast as possible.
rallentando (rall.)
Gradually slowing down; it means almost the same as ritardando.
a tempo
Return to the original speed.
rubato
A flexible tempo: the performer stretches some notes and hurries others for expression.
subito
Suddenly, as in subito p: suddenly soft.
fortepiano (fp)
Play loudly, then immediately soft.
morendo
Dying away: getting softer (and often slower) until the sound disappears.