Download and Install CASTER app
The CASTER application can receive and route audio from and to any audio device. It can also route audio between multiple audio devices.
All you need to do is connect your audio interface and you will see it appears in CASTER’s input and microphone tracks.
CASTER has the ability to route audio to its dedicated streaming audio device “CASTER Stream Mix”. All the tracks in CASTER are routed by default to this virtual audio device. Each track has volume controls for both the stream mix and your monitor mix.
Hitting record on in the bottom right panel will record all of your inputs separately. This makes editing your audio and video a breeze later since all of your sources are already in their own file and can be combined in whatever way works best for you.