* It's likely onomatopoeic: The sound "ta-da" mimics the sound of a drumroll, which is often used to build suspense before a grand reveal.
* It appeared in English in the late 1800s: The first known printed use of "ta-da" was in 1889, in a play called "The Private Secretary."
* It's possibly derived from French: The French word "ta-dà" exists and is used similarly to the English "ta-da." However, it's unclear if the French version was the origin of the English one.
In short: While the precise origin of "ta-da" isn't known for sure, its likely roots lie in the sound of a drumroll and its ability to create a sense of anticipation and excitement, much like the way we use it today!