When Apple first unveiled its Lightning connector, there was a debate about whether or not it was needed at all: what can this proprietary tech do that standard micro-USB can't? Well, it looks like we're going to find out soon. Sources for 9to5 Mac understand that Apple has published a new specification that lets headphone makers use an iOS device's Lightning port for audio instead of the normal 3.5mm jack. On a basic level, this allows headsets to launch apps and carry more than just the usual playback controls. However, there's reportedly an advanced spec that permits a lot more -- headphones could include digital-to-analog converters and other processing that overrides what's in the device. If you're not happy with the fidelity of the built-in hardware, a new pair of cans could provide an upgrade.