"modern" headset remotes that work with devices from a major vendor have long since abandoned the analog resistor approach in favor of a digital system. The de

"modern" headset remotes that work with devices from a major vendor have long since abandoned the analog resistor approach in favor of a digital system. The details of the implementation aren't disclosed, but people have seen a whiff of it, e.g. here: http://superuser.com/questions/107378/what-is-the-apple-mikey-hid-driver-for http://superuser.com/questions/107378/what-is-the-apple-mike...