One way of streaming audio from another application on the same computer is using a routing software. There are several routing softwares available. We show you here how it works using Dante Via.

Step 1: Download and install Dante Via

Step 2: When opening, you see Audio Sources on the left and Audio Destinations on the right

Step 3: Choose the application on the left you want to play audio from and drag it to the Audio Destination "Stereo Application Input"

In our example we drag and drop QuickTime Player.

You can even choose several audio inputs and mix them.

Step 4: Open the LiveVoice speaker interface in a web browser. Allow microphone access.

Pro tip: Check the "Remember this decision" box :)  

Step 5: Choose "Dante Via Stereo" as audio input in the LiveVoice speaker interface and hit "Start".

As an alternative: If you don't want to install a routing software, there are also othe ways - see here.