Harmony The combination of several notes sounded simultaneously to produce a chord.
Improvisation
The creation of a musical work as it is being performed, or: making it up as you go along.
Interval The distance between two notes, either played simultaneously or one after the other e.g. with a 'fifth', the two notes will be five notes apart, including the first and last notes.
An interactive guide which helps you understand key terms in music by bringing them to life with sound, and moving images.
