Source-Connect Link not receiving audio when Pro Tools is set to 48kHz sample-rate
Version 3.6 - 3.8
This common issue is caused by a bug in Apple hardware.
To fix, simply make your default input and output in System Preferences any Analog setting e.g. built-in or line-in. With Source-Connect Pro you will find this under Settings. Then make sure your sample-rate is 48khz in Source-Connect. You can now choose Link again for your output.