We use the term melodic line to refer to a Musical phrase.
A melodic line can be straight or curvy, with big jumps or small intervals.
The melody is the composer's signature mark as his personal imprint.
The elements that compose a melody are rhythmic and melodic cells.
The range of a song is like the tessitura of the human voice. It ranges from the highest note of the melody to the lowest or vice versa. Then the notes of a melody are disposed in ascending or descending consecutive order. In the case of a melody as Camptown Races the range would be from Middle C to the C an octave above (skipping the B).
It is better to limit the range of the melody to avoid creating a difficult song to almost impossible to remember. A simple song usually finds its range in an approximate scope between a sixth and an eighth (eg, Camptown Races, as seen in this score).
When a composer writes a melody is as if he or she is pulling a threat. Once we have the first note there are three options to continue it: repeat it, play or sing a note higher than the other or playing a note lower than the first.
The vocalization is as important as singing properly the melody.
Vocalization is to give precise intonation, correct pronunciation and sense to what is sung.
A singer should pronounce correctly the lyrics and try to give 'life' to the song.
A singer can also perform a song in a language unknown to him or her and therefore diction should not be neglected. To achieve this, he or she must memorize the pronunciation as similar as possible to the language in which it is composed.
The melodies can be classified according to their ending. If it the ending remains in tension, we call this 'suspended melody'. If, however, we find a tonic chord at the end, we have a conclusive melody.
We can also find parts within a melody, something like the phrases that make up a meaning-complete sentence.
At the beginning of a melody in two parts we call it Protasis and the end is called Apodosis.
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