I remember experiencing issues earlier last year with Zoom correctly transmitting the sub bass frequencies in a music production class I was taking.

Perhaps that was a user error, but in a craft where getting your frequencies right across the whole spectrum is paramount any kind of lossy optimization can lead to undesirable results.

I wonder if there are parts of Zoom's audio transmission that optimize for the frequency range of the human voice, and everything else gets mangled a little, along the lines of chroma subsampling optimization in the visual world.