duo some line icons collection. harmony, accompaniment, unity, synergy, lyrical, melodic, duettists and linear

vector icon line sign harmony accompaniment unity synergy lyrical melodic duettists collaborators antiphonal choral duetto vocalists harmonizers partnering synchronized dualism twofold doublet combined cooperative harmoniously symbiosis interdependent counterpoint intertwined interwoven echoing reverberating resonating consonant dissonant blending mixing interacting dialoguing complementing enhancing parallel underscoring amplifying oration vocalizing singing crooning serenading