The phrase "over a backdrop" is correct and usable in written English.
It can be used to describe something that is happening or being presented against a particular background or setting.
Example: "The artist painted a stunning landscape over a backdrop of the setting sun."
Alternatives: "against a backdrop" or "set against a backdrop."
In the second Adagio, Andrea Lee, a cellist, offered elegant solo work over a backdrop of deep-umber rumination.
The language is unmistakably Japanese, the lyrics delivered in familiar high-pitched tones over a backdrop of electronica.
"Who do you think this Government should be giving more support to?" is the first question on the online banner, over a backdrop of the Union flag.
"We can end a war," reads the message on the screen, over a backdrop of Mr. Obama talking and rousing rock music playing.
The Romney video has no narrator or anyone speaking — just elevator music over a backdrop of text and images — and it attacks Mr. Perry over his immigration policies as governor, linking him to Gov. Jerry Brown of California.
It was midnight in the back garden of St. Nick's Jazz Pub in Harlem, but the sea of dreadlocks and the murmur of patois over a backdrop of lilting Bob Marley made it seem more like midnight in Kingston, Jamaica.
Such a push – and rancour over refugees – were a backdrop to a failed Arab League economic summit in Beirut over the weekend, in which only the leaders of Mauritania and Qatar turned up – the latter for barely two hours.
After months of an intense dispute over oil, against a backdrop of an insurgency in Sudan that it accuses South Sudan of supporting, South Sudan captured Heglig, which it said Sudanese forces had "abandoned".
Financial stocks gained after Australia's central bank said the economy looked to be slowing enough to reduce inflation significantly over time, providing a backdrop to ease interest rates from their 12-year high.
Mr. Reagan was one of several political figures to use the street as a backdrop over the years.
How can what you have learned remain relevant over the next 60 years against a backdrop of technological upheaval and industrial transformation?
