Articles about the Lightning headphone spec from a couple of years ago suggest that it only includes digital audio. They even specify a DAC that should be used.

Articles about the Lightning headphone spec from a couple of years ago suggest that it only includes digital audio. They even specify a DAC that should be used. https://9to5mac.com/2014/06/03/apple-introduces-mfi-specs-for-lightning-cable-headphones-support-arriving-in-future-ios-update/ https://9to5mac.com/2014/06/03/apple-introduces-mfi-specs-fo...