Not sure whether you’re referring to the exported clip or the clip in my timeline.
I should mention that I’m exporting a nested sequence.
When I click GET INFO on the EXPORTED clip – the audio CODEC is listed as Linear PCM.
I’m not sure how to find out any other info.
When I look at the Movie Properties on the clip in my timeline it shows that there is audio, but doesn’t list the format.
Does this help? Not 100% sure I’ve answered your questions.