SOLVED: Disconnecting keyboard and plugging it back in stopped the sound staccato.

Yes, it's the first time has happened.
It did not happen outside of Factorio, no. My keyboard behaved completely the same as usual outside of Factorio.
Edit: And I don't know how to use several buttons at once with ...

When I copy something and then try to paste it, I sometimes hold the key combination CTRL + V a bit longer. After 1-2 seconds, a strange noise is being generated, as shown in my screen recording.