Wolfgang
Judging from the high-resolution picture on the wiki it looks like the
phone has a very special 2.5mm connector with 4 separate electrical connections (instead of the more common 3-connection version). If I'm interpreting this correctly they are running both ground, left-earphone, right-earphone and microphone in one plug. To me, this seems much more convenient than the 2x 3.5mm plug method used for computer headphones.
hopefully it is a 4-conductor connector. unfortunately there are two ways manufacturers commonly wire up the 4-conductor 2.5mm connector. I have a set that is wired for the palm way of doing it that I plan to try. Nokia ships 4-conductor 3.5mm stereo headphones w/mic with their n800. The jack is backward-compatible with 3-conductor headphones. It's the first time I've seen a 3.5mm plug that could work with a microphone. It just might take a while to catch on. On the a2dp front, we got some help from Nokia on our codec and now it's running nicely in (mostly) 32-bit ops. It should be pretty easy for the cpu to encode stereo audio on the fly, but there is still a delay that we need to accommodate. Brad
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