The demo was very impressive though.
I'm in the process of doing some recording and get sent files from a friend which I always remove the background noise of the room that they record in. But it's nothing like what is happening there.
I use Reaper mostly as a DAW and use Reafir to subtract what I don't what and it works well. If you don't know it, you play an example of what you want to remove and it draws a little graph and then removes it throughout the track. But if it starts to be at a frequency level that includes where the vocal or instrument is then it starts to cut from that too. So very impressed with Krisp and the other thing in that it doesn't attack the vocal in the same way. But it's a different thing to what I would ever use as I try to record without having to remove things.
It does remind me. I think there was a pharmaceutical company years ago I delat with who could remove smells rather than mask them. Apparently they did a presentation and were met by reactions of 'that's not possible' only for the guy to say well it is because there is a bucket of dogshit under the table that you haven't yet...