I started my first stream to learn how to use OBS and Twitch. After some time, everything worked pretty good for a first stream. However, I have one question. I use a gaming PC and a streaming PC. I tried to preview my stream on my streaming pc before I went live on twitch. I thought that this shouldn't be a problem because I can see my stream in OBS on my streaming pc anyway. However, I was not able to hear any sound on my streaming pc. I just saw the video in obs, but without sound. As soon as I went live on twitch, I was able to hear the sound on twitch. Do you know why I can't hear the sound in OBS? Is this normal?