Talk:TRRS Phono Plug

sources

Headset headphone microphone for mobile devices can have 2.5mm or 3.5mm plug in TRRS.

3.5mm TRRS to 3.5 TRRS Adapter for Select Phones - 3.5mm to 3.5mm TRRS adapter that reverses the microphone and ground pins

• http://www.meelec.com/MEElectronic_TRRS_Adapter_for_P_Version_Headphones_p/adptr-trrs-35.htm

iPhone Compatible Wiring - The iPhone style wiring is also compatible with the following devices (Partial list):

• https://www.kvconnection.com/Articles.asp?ID=165

Phandroid - Accessory wired earbuds with mic

• http://androidforums.com/lg-optimus-s/295551-wired-earbuds-mic.html

Notes on radio Headsets connection - There are basically eight types of wiring harness for the headsets available ,they are determined by the type of plug wiring required for the radio transceiver.

• http://www.amalgamate2000.com/sales/notes_on_headsets.htm

Okay to finally clarify this issue for all.

In all of these explanations- imagine that the headphone plug is facing right (ie -->) Connection types for headphones with volume controls, and a mic are labeled as TRRS. The original 3.5mm headphones (for the first ipods etc) used TRS- Tip, Ring, Sleeve- from left to right, Left Audio, Right Audio, Ground.

On TRRS there are 2 types- the original TRRS configuration was produced by Nokia and has a pinout of Left Audio, Right Audio, Mic, Ground.

Apple came along and in typical elitist fashion changed their pinout to Left Audio, Right Audio, Ground, Mic.

This is why many apple headsets will not work with android, because the last 2 connections, for Mic and Ground are switched. It also presents an issue with controls. The way that songs are skipped (forwards, backwards, and pause)comes through signals that are sent down the ground channel. The way that volume is increased/decreased happens through signals sent down the Mic channel. This is why- if you try a set of newer iPhone earbuds on the GSIII- as I have- the center button does nothing, but yet the volume up and volume down both pause tracks, and allow you to skip them!!

Apple has patents on their software that will interpret these signals- and in fact the resistances (the actual ohm resistance in-line on the controls- not to get scientific or anything are designed to work only with Apple products.

Hope this clarifies things up a bit

• credit to: djdosage
• source: http://forums.androidcentral.com/t-galaxy-s-iii/186069-headphones-mic.html