There are two separate platforms, New and Original Livestream. Procaster will go live to your Original Livestream channel, while Livestream for Producers will go live to your New Livestream event. Both will allow to stream with a free account however there is slightly different functionality between the two at this time.
Speaker's Audio is capturing any sound played by your computer. You would have to find the program creating the beeping sound and close out, or disable speaker's audio. Please note you may not want to have your channel or event page open while you are broadcasting, as it will cause an audio playback loop.