Hi there, what you are currently requesting is not possible, no.
The Aeros has two* main stereo Feeds: The Live output and the Loop playback.
The live output is the live signal that can be set to be coming from either the Main inputs and/or the Aux input.
The Loop Playback is the signal that is recorded to the Aeros and plays back. This functions in the same way as the Live Playback as far as routing goes.
Loop Playback can then be set to go to either the Main or Aux Output, or both.
Live playback can be set to go to either Main or Aux Output, both, or neither (to avoid phasing issues)
There have been requests on the forum to expand this capability, namely this one.
Feel free to expand on it there if it does not already cover what you want, or make a new request if it seems like a different issue.
Thanks!
*EDIT: An addendum here actually: Technically there are 3 main feeds because you could also send something into the Aeros Aux In and out the Aux out only while also having a stereo signal going into the live input and having a stereo signal recorded to the loop playback and the signal routed to only the aux out in this scenario would not affect the other two signals.
But, since there isn’t much use to this within the Aeros looping mechanism, it is better a sidenote.