Sound actions allow you to play a sound on your computer. You specify the sound file you wish to play and the volume to play it at from 0-100. When diagnosing issues with sounds not properly playing, here are some steps to follow:
When selecting an Audio Output Device, you can optionally use the Mix It Up Overlay to play sounds over. This can be useful if you want to more directly control audio levels or handle stream audio pass-through in your streaming software.
When using the Mix It Up Overlay as the Audio Output Device, sounds will ONLY be played through the Default Overlay Endpoint. This is to ensure that audio does not duplicate and create an echo effect if you are utilizing multiple Overlay Endpoints on the same scene in your streaming software. See the Overlay Endpoints section for more information.