> When you plug an audio cable into a smartphone, it just works. No, hardware-wise you're still going through a DAC, and the complex audio subsystem of the OS is still deciding, upon receiving the connection signal, to re-route the application audio through that headphone DAC. Or not. Jack or Lightning doesn't change this. > Apple can choose which manufacturers get to create Lightning-compatible audio devices. Sure.…
If a device has an audio jack with the aim that its owners make use of it, it has to provide audio when "something" is plugged in. It's not able to discern what's there. That is what "just works": not that audio is supplied, but that audio is supplied without the possibility to discern what (merely whether, and that a hack) it is being supplied to. That the software may disable the port when it's empty or just on a w…
At some point, sound needs to make it into your ears.