The phrase "a sort of audience" is correct and usable in written English.
It can be used when describing a type or category of audience that is not clearly defined or is somewhat ambiguous.
Example: "The event attracted a sort of audience that included both art enthusiasts and casual visitors."
Alternatives: "a kind of audience" or "a type of audience".
In 2004, a group of drivers bought sanctioning rights to the national tour, now known as the Rally America Championship, and set out to attract a sort of audience-in-waiting.
Mainly though I was gripped with panic about being able to play records in the vicinity of a sort-of-captive audience, as opposed to just the one weird, old guy in Belgium who I would occasionally WeTransfer artlessly recorded ambient mixes to.
It was a huge privilege to work with Rhodri – a deeply serious politician, who always combined that with an ability to communicate with any sort of audience or individual.
At this moment it seems difficult to realise that the idea of the chorus being anything more than a sort of stage audience was, at that time, a tremendous novelty".
For an independent release, it had a strange sort of audience and kept selling three or four years after we recorded it; it still sells more copies than when it first came out".
Thus we have a noble attempt at shaking up the traditional Broadway theatre, offering a different sort of entertainment for a different sort of audience.
Still, the United States faces a different sort of audience when giving ideas to Europe than it does when facing officials in developing economies.
The move also puts Twitter's app in front of a different sort of audience – those who are looking for easier ways to keep up with news on their mobile device, rather than those who want to use another social network.
Hunkomania sells a bizarre sort of audience agency where you make the choice, but they do everything.
"We don't view ourselves as just catering to a sort of bleeding-edge audience, or a bleeding-edge hip audience," he said in the Ace's boardroom, where a long custom-built wood table was piled with books like "Dorfsman & CBS," about the network's design director.
