Usually our users use built-in or external microphone as sound sources. But sometimes user would likes capture sound from system output. There are examples for it: capture sound from YouTube-video or sound from game. So let explain how do it.
Notes: if you would like capture from desktop Skype or Viber please use this instructions:
Step 1: install SoundFlower
For the task you should install open-source software called SoundFlower.
So download package from download link and install it step-by-step. Please use right-click menu for open package (see picture)
Step 2: configuration
a) open Application --> Utilities --> Audio MIDI Setup
b) in bottom-left corner click "+" and select "Create Multi-Output Device"
c) so you have "Multi-Output Device". Select it and check checkbox as on picture.
d) make new device as system output
Step 3: usage in JustBroadcaster
Use "Soundflower (2ch)"-audio source for capture system output.
Of course you can mix built-in microphone and "Soundflower(2ch)":
Be aware: we recommended use headphones for this case because you can get auto-echo (see about echo)