Ps4 sound with Capture Card?

I'm a little YouTuber and got an August Capture card yesterday. Of course, I tried it in a small livestream, but my viewers wrote in the live chat that they did not hear me or the game sound. So I came to the decision and have connected to my laptop an external microphone, but then you had hald only heard me and not the game sound.

So again briefly: I have an August Capture card and would like to transfer the ingame sound of Ps4 can someone help me?

Without more specific details no what did you connect the