Swinging Gains

In our voiceover booth we always have at least one mic hooked up at all times. The issue is that if you have the monitor speakers on and you open the door, you'll feed back. Which is, you know, annoying.
The simple answer is to turn the gains down on the input channels of the mics which are plugged in. But there's another better answer.

Arrows and circles indicate the buttons you need to press.

On the interface we use there are switches on input channels 1 and 2 which flip the input over to the high-impedance 1/4" front-panel jacks. So you press those switches and viola -- the microphone is turned "off".
So, that's your pro audio news from the Pandora Machine front today. You are ever so glad you check this blog.