The song occurs. authors must make up all the lyrics, melodies and even find a singer and a musician who is able to convey a song and make it feel like an audience to the music.
Music happens to be the author must compose the lyrics, even for singers and musicians who are able to convey the meaning of the music and the listener the feeling in the music.
The music will happen to write the lyrics, melody author, even a singer and music to media the meaning of the song and makes the audience feel in with music.