Here are the links to the audio files. Same source video file, one audio file taken from 10.81, and another from 10.84.
10.81:
https://drive.google.com/file/d/1dchBspVxTzk90HW70uV5drqrMkm9pojQ/view?usp=sharing
10.84:
https://drive.google.com/file/d/1OsJWwkVP2bh29jeyOKmhmYMPNKnzhXJV/view?usp=sharing
(note: these audio files are supposed to be fairly quiet background noise. Note when I snapped my fingers three times at the beginning of the video, the difference is huge)
This video file came from an IPhone SE 2020. (.mov format) - I tried using Handbrake to convert it to a .m4v file, but the same audio issue persisted.
Same issue, but even more pronounced audio noise came from a video shot on a YI M1 Micro Four Thirds Camera (.mp4 format)
Immediately upon dragging the video files into 10.84, you can see from the audio waveforms that something is wrong.
If there is anything else I can share let me know. I am in the middle of a project I just started in 10.81 right now, so I would rather not immediately re-install 10.84 just yet. Do you know if there are links anywhere for 10.82 or 10.83 so eventually I can try those out and see if the issue is there as well?