The phrase "a weak note" is correct and usable in written English.
It can be used to describe a sound or musical note that lacks strength or clarity, or metaphorically to indicate a lack of conviction or impact in a statement or argument.
Example: "The symphony ended on a weak note, leaving the audience feeling unsatisfied."
Alternatives: "a faint note" or "a soft note".
Only the butternut squash and pear bisque sounded a weak note.
Banking shares ended the year on a weak note, with dealers taking profits after an unexpected rally on Tuesday.
But while the national economy added more than 100,000 jobs in December, the city ended 2010 on a weak note.
"Business investment appears to have started the second quarter on a weak note but should rebound over the final two months of the quarter," Mr. Ashworth said.
The stock market opened on a weak note after retailers reported mixed holiday sales and as the prospect of a new budget battle in Congress loomed.
Oil is finishing up on a weak note before Christmas, as the Saudi comments from earlier in the week [about not increasing production despite the recent slide] continue to weigh on prices.
The decline in sentiment shows that the 17-nation euro zone began the fourth quarter "on a very weak note," Jennifer McKeown, an economist in London with Capital Economics, wrote in a note.
It consists of a flexible stick 1.5 to 10 feet (0.5 to 3 m) long, strung end to end with a taut cord that the player plucks or taps to produce a weak fundamental note.
he was pretty good and moved around well and had a solid finale that overcame a weak high note.
Public interest groups opposed to the deal called Mr. Cohen's letter weak, noting that it did not make any funding commitments for local or national news.
In the current economic environment, it seems a weak defense to note that greedy, dishonest executives represent a tiny minority of thousands of stand-up, competent business leaders who shepherd these companies.
