Lately i'm starting to use Reason for live performances: i control knobs and faders with a midi controller and i just improvise
What if i would like to add a new instrument while i'm performing but listening it just in my headphones and then send it to the speakers when i'm ready? Is this possible?
I am a dj too, i am used to prelisten the next track i am going to mix, so i wonder if i can do somthing similar with Reason too

Thank you so much!
IMPORTANT: i'm using Reason 12 and i basically stream my performances, so i actually don't have to send audio to speakers but to the streaming software (OBS)