Mute input signal while monitoring?

Yes, I have downloaded the latest driver for my interface.
My speakers are connected to the Audiogram.
Yes I can hear the input signal even if I’m not inside cubase but I want to controll it and mute it…
I’m not sure if I have access to direct monitoring, I’m not familiar with it.
I have a PC windows 7. 4gb RAM…

Regards Jonas :smiley: