sound/strike a note

strike (or sound) a — note

express a feeling or view of a particular kind.
2000 Times John McCain …was expected to strike a hawkish note last night, calling for the upgrading of the Armed Forces.
See also: note, strike

sound/strike a ˈnote (of ˈsth)

express feelings or opinions of a particular kind: She sounded a note of warning in her speech.
See also: note, sound, strike