All depends on the look. You can obviously use toggle switches, which give a good visual indication and don't need batteries. But this one has latching action buttons with LED indication of when on, which adds a bit of 'interest'. You may get buttons that stand out proud enough when active to be able to tell the switching arrangement with a downwards glance, but you'd probably need to see them first to make a decision as to whether that was sufficient. There's no guarantee that you'd see the LED anyway if it only shone forwards, you'd need to get some where they illuminated round the edge. But at least you could see the LEDs on a dark stage.

Personally I'd also need a volume control as well, or at least an overall kill switch.