[Gonzih]

So does that mean that software will always have mic on?

[gcr]

The presentation implies that you have to click the "share screen" button before your computer will try to detect the ultrasound signal.

[carlosdp]

Maybe, but there's no reason for it to send any audio anywhere while it's parsing ultrasound, so not a privacy problem.

[Gonzih]

Until software is compromised or simply has a bug that stream audio somewhere.

[RL_Quine]

In which case it could have just turned on the microphone itself?

[Gonzih]

Software that already is listening has more vectors of attack to put it simply. I'm not a fan of features that compromise privacy and security for the sake of convenience.

[RL_Quine]

That's really nonsensical. Nothing about using an audio input makes code more vulnerable. The interface is always there if the hardware is.

[tinus_hn]

If software that continuously listens to the microphone is normal this makes it harder to keep track of apps that should not do that.