I only have an 'iMac Pro Speakers' option when the headphones are not plugged in, and when I plug them in I have a second option 'External Headphones', but still no 'Built-in Output' option. In my After Effects Audio Hardware > Default Output I do not have the 'Built-in Output' as an option (as in the picture you supplied). But I can find no mention of the problem when searching online. As I have tried all I can think of, and the problem does not present itself when using the iMac's usual functions, it seems to me like it might be an issue between the latest version of CC After Effects and the Mac's latest Operating System (CC2018 15.1.2 and the iMacPro's OS Mojave 10.14.1). I have look into all preference settings both for the iMac and in After Effects and spoken to some IT colleagues with no joy. So I have to go back into the Preferences Audio Hardware and switch it back to speakers! This is crazy and never used to be a problem. But then if I unplug the headphones jack, the audio output does not automatically switch back to the speakers as it used to (and should). I now have to go to After Effects Preferences, Audio Hardware, and change the Default Output Settings settings from speakers to headphones. But this does not happen when in After Effects.
When using the iMacPro 'normally' - viewing YouTube clips online or playing a Quicktime movie or using iTunes for example - the audio automatically switches from speakers to headphones when you plug the headphones in - as you would expect.
When using After Effects in the past and previewing a comp the audio would automatically switch between speakers and headphones if and when I plugged in the headphone jack. (iMacPro mcOS Mojave 10.14.1, Adobe After Effects CC2018 15.1.2) Audio in AE not switching between speakers and headphones.
0 kommentar(er)
