Hello @jripley ...
I'm not sure what you mean by a 2021 "version" of Canvas. Canvas does not have a "version", but there are updates and new features that are applied every month. I'm not aware of any updates that would have changed the behavior of PowerPoint files. Though, to be honest, I've not heard of the ability to hear audio in PowerPoint files that have been uploaded to a course. (Full discloser, I'm a Canvas administrator at our school and do not teach courses.) Do you know how students were previously viewing your PowerPoint presentations? Did they have PowerPoint on their computer and were opening your file within the software? If you could possibly provide some additional details for us, that would be helpful. Thank you. Take care, and be well.
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