It gets batter after 6 or 7 est.
“It gets better after 6 pm or 7 pm Eastern Standard (Daylight) Time”?
Which indicates it’s more upstream than local.
For local choppy audio, I think one adjusts buffer sizes.
That said, I used to know whether reducing or increasing was more effective.
I’m out of practice and couldn’t say now.
But it’s usually a buffer size.
Off hand, increasing buffer sizes reduces chop, and increases lag.
Reducing buffer sizes (there can be several, since you have your VM, your OS, and even waaay down in your router, there can be a QoS buffer) can increase chop and reduce lag.
Or so I recall. Out of practice I am at the Intermediate level these days.
I hope this is helpful.
For upstream issues you upgrade hardware or service.