Think everything is good!
I think what happened is last night I was giving my Burson Playmate 2 another try last night on USB off of the NS and I had left it connected because for some reason it was working, and I was going to do some listening today for a write-up on it. For some reason in changing things to test that for you the NS completely froze up, and I could do nothing with it, so a hard reset was in order. Whatever was going on with my phone and monitor, well, Gremlins is all I can say,
Ok so on to you...
I would suggest starting with the NS in AIO mode, from the front dial select Analog.
If you aren't hearing anything, select digital, and then go back to Analog and see if that produces sound.
In the settings of the Stream-iFi app make sure you have the "software" volume selected and the startup volume disabled.
This should produce sound from the Analog outputs of the NS using the internal DAC, and send the signal out of either the 4.4 or RCA connections on the back of the unit. Do not just rely on the app, or physical buttons on the front of the NS for correctness, use both to verify you are in Analog in the app and via the Physical selection with the front dial of the unit.
I seem to be finding that sometimes simply selecting one from the app or by the front of the unit does not ensure it changes. I believe that at times the app and the unit are sometimes functioning independently of one another, as I have found instances of changing one or the other is not enough. If we had a setting accessible via the dial on the menu of the NS itself for HW/SW Volume control, this would almost make using the app pointless and is the one thing I really wish had been included in the function of the NS dial.
As I said before if you want to get onto a direct one-to-one setup just shoot me a PM.
Cheers!!