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Old 08-27-2012, 12:19 PM   #22
geekmaster
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Quote:
Originally Posted by chris_c View Post
are you absolutely *sure* about that? i know there is a mic by the usb port but my kindle was under the duvet when i tried the recording tests.

is there a definitive wiring diagram for the headphone socket?
I am never ABSOLUTELY sure of anything. All of my beliefs are subject to change if I discover compelling evidence that requires it. Speaking or believing in absolutes is often risky, especially when you do not allow new facts to interfere with your beliefs.

After all, it is possible that a production change could be made at some point to add such a feature as a remote microphone.

But my current knowledge based on eink kindle product specifications suggests that the earphone jack only supports 3-wire cables as used for stereo headphones and earbuds, but NOT the 4-wire cables like are used for stereo headsets with microphone, such as for apple products.

EDIT: Empirical/ad-hoc "evidence" such as your "under the duvet" claim do not rule out the possibility that the built-in kindle microphone (with AGC) may be sensitive enough to record your voice while speaking into the headset. Such evidence is no more reliable than other "small statistical sample" conclusions.

References:
Apple 4-pin pinout: https://discussions.apple.com/thread...art=0&tstart=0
Kindle Touch specs "3.5 mm stereo audio jack": http://www.amazon.com/gp/product/B005890G8Y
Standard 3.5 mm stereo pinout: http://pinouts.ru/connector/3_pin_st...onnector.shtml

If you have conclusive evidence to the contrary, I am anxious to see it so that I can have the opportunity to update my personal knowledge base. Please provides links and references. Thanks.

Last edited by geekmaster; 08-27-2012 at 12:37 PM.
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