I had the exact same issue as metanomaly. Static and then increasing sound when trying to broadcast. What fixed it for me:
1. Playback tab > Properties of Speakers > Advanced tab > set to: 24 bit, 44100 Hz (Studio Quality)
2. Livestream Procaster > Audio tab > Sampling rate set to: 44100 > Channel set to stereo
3. Open Audio Mixer > Have your Speakers source selected, and Microphone source (if applicable)
4. Go to your Livestream page and login > Go to Studio tab > go to Broadcast Live tab > TURN "Live Monitor: Audio OFF !!
This worked 100% for me, I hope it helps you guys out as well.