Melodiously.

In a melodic manner; in a way involving a succession of tones: opposed to harmonically and rhythmically.

adverb. In a melodic manner.

adverb. with respect to melody

"Like using the same chord progression, but always kind of melodically and lyrically having the song dynamically move ahead in a really healthy way and keep your attention as opposed to always kind of having to introduce new drum beats or new chords."