That is an old story, isn't it? I do remember this beeping, but today I see my an application where I need to enter my password the letters poping up quite delayed when the PC is still in booting/connecting to the netword-process. Is the data stored in the keyboard or in the PC?
Anyway, buffering is needed somewhere.... and, being honest, putting it into the Master will have tremendous effect on (already written) software. So probably not best SW architecture, but, as highlighted, I just want to take care the seldom situations when I(!) get mad and fool around with all the pots and knobs of my Master-Unit ... 