Live_audio audio server input (◎_◎;)? HELP

Thank you, it does make sense. I just still can’t figure out how to make it make any sound. In the manual there’ a thread given to test the computer’s internal mic… (which in system preference is picking up sound)

with_fx :reverb do
  live_audio :foo
end 

So I guess more specifically my question is why is SP not picking up the first input of my sound card and how do I double-check that for mac (it’s selected in system preferences as input but maybe there’s another step). I saw another thread with the same question but also no answer.