I have been troubleshooting this problem for two years on my office computer, home desktop and home laptop. I have tried all of these suggestions:
1. Rebooting computer
2. Clearing cache since the beginning of time and keeping it cleared.
3. Blocking cookies.
4. Shutting down Canvas on other devices so that only one was running it.
2. Changing the microphone authorization settings.
3. Trying different browsers (Chrome, Firefox, Edge and Internet Explorer).
NOTHING worked.
This week I think that I have figured it out.
The issue could be length of audio file. I tested a few recordings at various lengths. Less than two minutes per file created no problems. With one I let it record for 6 minutes and saved it. NO go.
When I have time (not right now, have a pile of grading), I will test times between 2-5 minutes.
This suggests that a longer audio file confuses interaction between browser and Canvas.
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