I tried to follow what they said but I couldn’t, I tried in a simpler way and I did it, if someone hasn’t.
create a Sound Submix and put it in both Audio Capture and Start Recording Output.
in the Sound Submix, drag another Sound Submix from the Output and set the Output Volume to 0 in it
to record other sounds together for now I’m having to create a copy of the sound and put it in the Sound submix I created,
it doesn’t seem like the right way but for what I need it works!