As of the writing of this article, sharing audio with a webcam on a Mac is not as easy as it is on a PC. It is possible if you have the right tools and the correct app settings. These steps were performed on a Mac running OSMontery version 12.5. You will need to download a free app called BlackHole (free as long as you provide your name and email address, otherwise you can't get it).
- Point your browser to: http://existential.audio/blackhole/ to download the installer. The installer is sent via email after providing a name and email address.
- To be safe, close all audio applications so you can ensure you have a clean install.
- Open and install the BlackHole installer package.
Using BlackHole with Audio/Midi Setup and your Sound Preferences
- Open the Audio Midi Setup app (it's the app that looks like a piano keyboard and can be found in your "Utilities" folder with your Applications).
- Right-click on the BlackHole 16ch icon on the left side of the window.
- Select "Use This Device For Sound Output" and a little speaker will appear in the bottom right of the Blackhole device list (shown in the next two images).
- Next, you need to create an Aggregate Device. This will allow you to select multiple outputs and have them all play out of one place. Click on the "+" at the bottom left corner of the screen and select "Create Aggregate Device".
- Select the devices that you want to be able to play at the same time by checking the boxes to the left of the device names you want to include. Don't forget to include your microphone!
- Now you need to move the BlackHole16CH output box. It's the yellow box located on the right side inside of the black window. Move this to the right in the chain by dragging and dropping. You will see a tiny yellow line that will let you know when you can drop it.
- Open System Preferences and select Sound.
- If it isn't already set, change this to BlackHole 16ch.
- Change to your input settings and then select Aggregate Device.
- In your webcam room take note of the microphone setting that you have and then change your microphone to Aggregate Device (Aggregate) from the toolbar at the bottom.
The participants in your room can now hear the audio playing from your Mac and you should be able to speak to them while the audio is playing!
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