You can do this easily with property nodes. You can right click the controls you want to hide/disable, and go to property node and then select disable or visiable, depending on how you want to handle the controls.
Assume you choose to go with disabling the controls instead of making then "invisible", ie hiding them. When the button "Noise" is pressed, in the true case, you will have a property node that is for each of the buttons that you want enabled. Wire a 0 to it to enable it. In the false case, you can wire a 1 (just disabled) or a 2 (disabled and greyed). You can find out what each property node does by pressing Ctrl-H to open the help box.
Good luck.
Kenny