I’ve followed the directions specified on the wiki to use iShowU to record computer audio in Audacity, including creating a multi-output device. In Audacity, I have the multi-output device selected for the playback, and iShowU as the input. However, when I record, there’s only silence. What am I missing?
Right this second, if you play your web page and Record in Audacity, it should show you a bouncing sound meter and blue waves. It may be silent.
Stop Audacity.
Set the Audacity Speaker window to Built-in Output.
Audacity > Preferences > Recording > [X] Playthrough (select). Record in Audacity and you should be able to hear it, but it may be late. You won’t get proper lip sync, but you will get the sound track recorded.
For those still struggling to record sound on a Mac(Mojave), navigate to System Preferences>Security and Privacy and click the Privacy tab. Make sure that Audacity has permission to access the Microphone- the OS treats iShowU as a microphone input device.
I have the same result as the original poster when following the Wiki instructions. When following the instructions in this thread, these steps:
Set the Audacity Speaker window to Built-in Output.
Audacity > Preferences > Recording > Playthrough (select). Record in Audacity and you should be able to hear it, but it may be late. You won’t get >proper lip sync, but you will get the sound track recorded.