recording yields pumping/breathing artifacts

[pragmatech]

Being able to just record via the browser is streamlined goodness.
Alas, when to A/B with say, Audacity, the AM recording seems to be invoking
compression or limiting (swimmy?), but degrading the recording in any case.
Here's a sample that was entirely recorded on Chrome w/ me, guitar, into a pretty good macbook mic:
https://board.groundwire.xyz/attachments/files/file_1652581972202.mp3
edit - now wondering if this is caused by something akin to echoCancellation or noiseSuppression, and if so, would it be introduced from AM or in Chrome?