[Noisebridge-discuss] converting mic level to line level

[Joel Jaeggli]

On 12/18/10 11:06 AM, Jonathan Lassoff wrote:
> On the iphones and other phones with similar connectors, there's stereo
> audio out, and monaural audio in on a 4-pin TRS connector.
> 

http://geekspeak.org/blog/2008/08/12/iphone-headset-plug

the microphone is on the sleeve at the base, the ground is next to it...
inserting a 3 pin trs connects the microphone input to the ground.

joel