When I read for the critique group, I often think it's easier to get nuances across using my voice rather than just words on the page. Here is a contest that lets you read your work out loud as part of the experience. The Missouri Review has created a writing contest with an audio angle.
There are several categories. You can read a poem, short story, or some creative non-fiction, present a personal essay with added sound effects, or even create a mini documentary.
The entry fee is a bit steep - $24, but the prizes are accordingly generous at from $500 to $1000.