Audio passthrough OR Alexa integration..?

I have a new N330, love it apart from when a source (Alexa flex in this case) is connected to Aux in there is a delay., I’m guessing due to A2D conversion….?

What I am trying to do is play music through an Alexa Echo AND the Powernode at the same time, with zero lag on the N330’s output… Is there a way to do this? Please?