I got myself a new mic, that only has TRS (mono connection). Usually mic jack is TRRS (two rings, pseudo stereo), but its not always the case. And so, I have found out that Nu Audio is always trying to record my microphone as stereo, even when its mono, like 99% of mics on market. The recording formats avaliable are stereo only as well. So I can't tell me system I have a mono mic and all the voice com systems that support stereo microphones, think its a stereo one! 
Please add mono recording mode or "downmix stereo to mono" feature.