Dubler 2 & FL Studio : not hearing anything


I installed Dubler and configured it with FL Studio. When I sing in the mic, if the option “inbuilt audio” is checked, I hear the sound of Dubler 2, but when I unchek it, I do have the signal apparently in FL Studio visually, but no sound at all :

Any explanation of what I missed ?

Hi, can you please send a screenshot of your audio preferences in FL Studio. Does audio work as normal in FL with anything other than Dubler?