How to send keystrokes to two computers SIMULTANEOUSLY?

Question

Keyboard

Hello! The task is to control two computers from one keyboard, i.e. so that when you press a key, it works on two computers at the same time. One key is enough.
KVM type options are not suitable, because they work by switching, but it is necessary at the same time. In general, the goal is to synchronize the launch of sound and light on two computers.

Answer 1

Connect the keyboard to two different computers via usb hub