I second @sicijk comment. Sending audio to EXT IN always outputs the original dry signal on the master outs + any amount of FX applied to it. Therefore this method cannot really be used for return-style FX processing. I guess one could send audio to one of the tracks (A4 user here - guess that applies to the AR as well) as oscillator source and disable the master out for that track to get only the wet signal from the send FX out to main. However obviously you loose a track, the track must be triggered and envelopes need to stay open etc. - so I see that as something you may want to do occasionally (results can be great BTW - esp playing with filters and p-locks) rather than a default “FX box” config. It would indeed be very nice if EXT IN supported some kind od dry/wet adjustment for return-like FX processing (or even just a way to disable entirely the output to main of the incoming signal). I did some tests a while back reported in this post
2 Likes