Audio-only broadcasts are possible and many Ustreamers do this. The best way is to use a 1/8th” to 1/8th” line-in to connect your audio input and output points on your computer. You will need to have these connected before you open your broadcast console. Alternatively, you can use free programs, such as Soundflower for Macs. If you have a PC, you can set your audio to stereo or wave out mix. To do so, open your volume control, go to ‘Options’, then to ‘Properties’, and make sure that ‘Wave Out’ or ‘Stereo Mix’ is checked.