Hi
I'm sure you're all aware of the leads on headsets and so on which have "Play/Pause, Fast Forward and Rewind" controls on them; and the 3.5mm stereo jack plug with *4* lands to accomodate the extra functions.
Can anyone direct me to the standards for producing such a lead? I would also like to know if the ones with three buttons are digital or simple switches... as delivering three different commands on a single cable might be problematic otherwise?
Anyway - any info that anyone can offer me about these leads would be helpful, or links to such info; as googling has not been fruitful. If feasible I intend to build such a lead...
Thanks