If you have multiple devices, make sure Gatheround is connected to the correct device!
To change your device input:
Navigate to the device settings gear within your Gatheround event. This appears on the top right corner of your screen.
Under the Camera & mic tab, select your preferred camera and microphone.
Preview your video, test your microphone by clapping your hands, and assess your speaker by clicking the button to play a test sound. If any one of these doesn't work, check your corresponding hardware (e.g. if you can't see yourself, ensure your camera is unblocked and plugged in).