Livestream does not offer an audio-only service. We are primarily a live video platform.
We do offer a stand-alone encoder that allows you to stream without the use of a computer. The Livestream Broadcaster takes audio and video from an HDMI camera and streams directly to New Livestream (new.livestream.com) without the use of a computer. Please keep in mind that with this solution you will still need video, even if it means sending black video. To learn more, please review our store: http://new.livestream.com/broadcaster