I guess what he is talking about is more likely called a “listen mic”. A mic in the Studioroom to listen to during breaks of the “real” recording.
You can only have ONE talkback mic in the CR of Cubendo. So you need to set up a channel in your Mixer and route that “LISTEN MIC” as an input to that channel. Route the output of that channel to your monitors and keep it muted until you want to hear the one speaking to this mic.
You can even record that mic this way - sometimes it is nice to have a dirty mic like this. It’s kind of common on Drum recordings for e.g.
For a Singer / Voiceover situtation you just use the mic infront of the one acting to it ! So no extra mic )