Is there a way that I can add two audio inputs, where one is the built-in internal mic, and another is a wired earphone mic plugged into the headphone port? When I plug in the earphone/mic, I lose access to the internal mic.
I found some tutorials introducing "Aggregate Device", but I can't make it work with those two mic's.
Best Answer
You will need to use an external device one way or another if you want to either the internal mic or your headphone mic. Though, for decent recording I don't recommend either as they are (barely) designed for the most basic recording tasks.
The problem lies with the headphone jack. There's a physical switch inside the port itself that disconnects the internal mic so, if you choose to use that port, the internal mic will get disabled.
If you want to aggregate two mics, here are some solutions:
I personally use the second option mostly as a USB DAC for connecting my Bose Wave radio to my iMac for quality sound, though I do use it on occasion when I want high quality recordings (either via microphone or line input)