Definition of the melodic curve also called volute or arabesque, which is made of small and larger intervals, and based on a scale or a mode. A melody is a serie of tones or notes, that take place in time. It is therefore a horizontal conception of music. The notes keep coming to make a melodic curve or "arabesque". They Follow one another by intervals. for example here: -from C to B: minor second -from B to C: minor second -from C to D: major second -from D to E: major second -from E to G: minor third -from G to C: perfect fourth -from C to B: minor second -from B to A: major second -from A to C: minor third -from C to F: perfect fourth -from F to A: major third -from A to G: major second -from G to A: minor seventh -from A to B: major second -from B to D: minor third -from D to C: major second The melody we used as an example, is based on a major scale. So we say that our melody is in the key of C major.