The phrase "a sharp note" is correct and usable in written English.
It can be used to describe a sound that is high-pitched or piercing, or metaphorically to indicate a critical or pointed comment.
Example: "Her criticism came as a sharp note in an otherwise positive review."
Alternatives: "a piercing tone" or "a cutting remark".
From time to time, though, a sharp note filters through.
The fresh basil, a little garlic and seasoning lent a sharp note that only amplified the tomatoes' sweetness.
The chapter on AIDS begins with a sharp note of criticism: an accusation that the medical establishment is acting "in passive connivance with the homosexual lobby".
A school teacher sent a sharp note to the mother of a little girl, who had come in tardy and gone to sleep twice during the session.
His presence certainly added a sharp note to a traditionally bland ceremony which the organisers tried hard to flavour with authentic Welshness.
The cutback front porch, for example, is made of cedar, a sharp note on the otherwise placid blue facade that adds depth and offers a modern spin on the dormers and porches of the neighboring homes.
To the south and east, the landscape takes on a sharper note as the hills become higher and the terrain less hospitable.
A sharper note of independence from Britain came when Curtin insisted (February 1942) that Australian troops recalled from the Middle East should return to Australia itself and not help in the defense of Burma (Myanmar), as British Prime Minister Winston Churchill wished.
It was also the first for C. W. Clark, a businessman from Dearborn, Michigan, who bought Sharp Note as a yearling from Walnut Hall Farm for a thousand dollars.
Consider product A, in which layers of cedar and raspberry strike a sharp upfront note, while clove and creamy notes add body while contributing an exotic, sumptuous character that conveys luxury in its essence.
Occasionally, as in Fifth Avenue Critics, Sloan imparted a sharp satiric note into his work.
