Doesn't list headphones when connected

[InsomniacSoftware]

When the audio is set to "Internal Speakers : Built-in" in the Sound PrefPane, SAS -c returns "Built-in Output". When I plug in my headphones, the Sound PrefPane changes to "Headphones : Headphone Port" but SAS still returns "Built-in Output".

Is it possible to detect if the "Built-in Output" is actually the internal speakers or connected headphones?

I'm using a Late 2015 iMac running macOS Sierra 10.12.3

[zuckschwerdt]

All possible outputs are listed with AudioSwitcher -a. We'd need to use a different API to get something like a routing info for the devices.

[wangchou]

Maybe this api?
https://stackoverflow.com/questions/14483083/how-to-get-notifications-when-the-headphones-are-plugged-in-out-mac