Hi Richard,
Excuse my lack of knowledge here, I have so much to learn. From what I have learnt and have been told, when recording people speaking it is best to record in mono and not stereo as I was told stereo picks up more ambient sounds such as background noise.
I currently use two Tascam DR05 recorders and have one wireless lav mic recording in each device, then in post production I import the two recordings and work with them in final cut pro. This works really well and the sound is great as there is hardly any background noise and just the voice of the person.
So when I purchased this new recorder I expected to do the same, but this is not the case as I am learning as you can only monitor one person at a time. When you use stereo you can listen to both as one is in each channel, so in each ear which I understand. But would this option pick up more ambient noise? or I am getting that wrong.
Again sorry for my lack of knowledge, learning all this is fab.