Thread: Stereo?
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Old 09-05-2007, 01:57 AM
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Quote:
Originally Posted by Gilliland View Post
So you seem to have some of the basic concepts right, but you've got them all swapped around. And it does appear that we agree that HTC is not following the industry standard. As you put it, "HTC went the other way around".
Other way around vs. other cell phone makers.
Truth is, I'm using an adaptor that dates back to before the music phones came out. Before the cell phones decided to add a third connection for the other ear, there were already devices using the 2.5mm jack with regular L+R pin layout instead of mono+mic like phones do.
Examples are the ipaq 1900 series ppcs, some (very few) mini-disc players, portable audio recorders with line-in stereo, and some weird Chinese pen-sized mp3 players.
Then cell phones added the third pin and everything has been incompatible ever since. When this first happened, people were buying the stereo adaptors from places like Radio Shack, and returning them because their Motorola's and Samsungs and LG's were only outputting one ear at a time unless they pulled it out a tiny bit. So, all these companies started making "stereo cell phone 2.5mm adaptors" and hence all this confusion.

Quote:
the signal routing was exactly the same as with the full stereo headset, so the phone still needed only to test the impedance on the first ring. As far as the phone was concerned, there was no difference between a stereo headset with microphone, and a stereo headset without a microphone. If the headset had a mic signal, it got routed properly. If it didn't, then the microphone input got grounded to the sleeve, which is exactly what you'd want.
I don't think this is true, since I've never seen or heard of anyone who didn't have a problem using the wrong adaptor. I'd like what you're saying to be true... It sounds like a simple solution to a complicated problem, but what phones have you seen that do that? All the ones I've seen needed to be pulled out a bit to make them stereo when using my adaptors from my old 2.5mm equipment. HTC is the only manufacturer that uses the same pre-cell phone standards for 2.5mm as the older equipment that I've had (which I'm thankful for since I have all this junk already).
There is no real standard I suppose, but I consider the first and oldest layout the proper one if only because it came first.

Anyway, it makes no difference really. Bottom line- it works with the right stuff, and no, it does not need to be HTC specific.
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