Songs with lyrics first usually don't sound so pleasant to the ear, because the words are made first, and the songs have to be matched according to the words, which will inevitably be a little rough. However, the great composers handle it well, and the songs they produce will be different and have a unique flavor, achieving amazing results.
Compose the music first and then fill in the lyrics. This kind of song usually sounds smoother, because the melody is a series of notes inspired by the inspiration. It will be easier to make a song if you fill in the text later. Because we are always more proficient in writing than in music, because the same sentence can be expressed in different languages, but it is difficult to replace the same song with other notes, and the adaptation category is counted separately. However, it is often difficult to integrate the lyrics and songs of such songs because they are composed first and then filled with lyrics, but everything is not absolute.
There is another way of composing music, that is, arranging the orchestration of a song according to a certain harmonic progression, that is, as the saying goes, preparing the accompaniment tape first, then humming the song according to the music, and humming the melody through the musician's perception and understanding of the music. Because it is humming, the melody will be particularly free and rhythmic, which is more efficient and advantageous than the above two, so many musicians now adopt this method.