[Zenst]

Nope as different frequencies propergate at different speeds.

However the initial greeting at start of the meeting would be good enough to cover that. Though some feedback and constant recalibration would be ideal and doable, That covers things like people entering the room and briefly changing the rooms acoustics with the door open briefly. Then somebody closes a blind and things like that, even somebody moving a coffee cup on the table would have (whilst small) an impact upon the acoustics. Though in that last instance, somebody moving a cap nearer a device would have a bigger impact upon that single source.

Though easiest way would be having a sound source on the main camera that did a simple frequency sweep - if you wanted to use a reference point sound source for calibration. You may even get away with single calibration then, though dynamic calibration and using the meeting itself to constantly recalibrate, whilst more effort, would give a better result.

But be interesting seeing this in action and how they handle aspects like that.

Indeed, thinking it thru you could have each device as it joins into the meeting do a calibration tone sweep that the other devices would pick up. That approach may well be better as you could get a more accurate map of all microphones in relation to each other that way. So initial login/join of the devices would handle that aspect nicely.