Use Parametric EQ 8 in invideo Editor’s Effects > Audio library to adjust frequency ranges in the sound. EQ changes tonal balance, so it can help when a recording sounds boomy, boxy or overly sharp.
Identify what you hear, make a small adjustment and listen again. Avoid using one fixed setting for every speaker or microphone. Keep the voice recognisable and check it against the music. If the problem is uneven volume across words, compression may be more relevant than further EQ.