So you want to edit in Premiere Pro with your headphones plugged in, but after you plug them in the audio still plays out of your speakers?
So you go to your Premiere Pro Preferences and then to Audio Hardware and change your default Audio Output to External Headphones. But then 30 minutes later you want to listen to your audio through your speakers and you have to go through the process again?
Or perhaps you remember how it once use to be when it just worked automatically?
Here’s how I fixed this problem on my Apple Mackbook Pro, running MacOS Mojave 10.14.5. If you’re on Windows OS I’m sorry but I can’t help you right now.
Step 1: Plug in your headphones into your computer.
Step 2: Open “Audio Midi Setup app” This is found in your Applications Folder inside the
Step 3. Once that is open click the “+” button on the lower left hand of the app window and choose “Create Aggregate Device.”
Step 4: After creating the Aggregate Device go to the lower right-hand panel and click the box next to “External Headphones”, then click the box next to “Macbook Pro Speakers”, and finally you’ll probably want to select any audio inputs you want. You get the idea. I believe it may be important that you select your headphones first in the order. If you don’t you can rearrange in the grey window above by dragging the colored rectangles.
Step 5: Closeout of the Audio Midi app and open up Premiere Pro.
Step 6: Go to Preferences, Audio Hardware, and in the “Default Output” choose “Aggregate Device”. You can also set “Default Input” to what you want too. Click Ok and you’re done!
Now if you open up your Audio Hardware preferences again in Premiere Pro and unplug your headphones and then plug them back in you should see your Output Mapping change at the bottom of your window.