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I want to solve the problem with new Android phone (I use LG G5; and Motorola-Turbo2 too, but i dont care about it).

I use two kinds of microhpones (4 pin) :

=========== Wired =========

enter image description here

This mic actually has only 2 working wires (3rd an 4th rings connected to MIC board). Top 1st and 2nd rings are just empty.

=========== Wireless =========

enter image description here

==== Problem ===

I can use WIRED mic perfectly with LG, but not with MOTOROLA (MOTOROLA cant see that as "mic", thus doesnt get any voice from it).

However, I tried to use Wireless microphone system with LG, it cant obtain voice (i have tried all ways), but MOTOROLA works with appliance perfectly.

As you know, the receiver outputs audio exactly on the same 3rd and 4th rings, but in addition, it adds some electrical power too, as a person is able to hear it softly in speakers (as opposed to WIRED microphone, which doesnt output anythig if something doesnt powers it)

Addition: I am a bit technician and tried to manually cut wires & connect lines with each other, to every possible combination, but in none of the case the LG worked with the applicance...

p.s. I dont think that it matters whether 3rd or in 4th ring is "ground", because when I have exchanged 3rd and 4rd (ground & microphone) wires, it didnt matter for phones. They are working the same way, only with "beloved" types...

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  • Try a headphone with mic and see if it behaves differently.
    – Robert
    Commented Jul 24, 2017 at 19:44
  • @Robert "headphones with a mic" to which one i should connect to see any change? should i try that with WIreless Receiver?
    – T.Todua
    Commented Jul 25, 2017 at 10:45
  • Most smartphones are shipped with an in-ear headphone with integrated mic. I would try that in all connection variants.
    – Robert
    Commented Jul 25, 2017 at 11:42

1 Answer 1

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tl:dr; Based on your observation that it works with Moto but not with LG, my guess is that it is due to conflicting TRRS standards -there are two standards. OMTP which is the older standard and CTIA/ AHJ which is the standard all newer Android devices are expected to follow

Details and solutions to overcome are listed

From TS/TRS/TRRS/TRRRS: Combating the misconnection epidemic by Allan Tépper - ProVideo Coalition which talks of this problem on Android phones

There are two TRRS standards - OMTP and CTI / AHJ

  • OMTP is the older standard

    The older OMTP wiring standard calls for Tip to be used for left audio, Ring 1 to be used for right audio, ring 2 to be used for microphone, and the sleeve to be used for ground. According to my research, this older OMTP standard is found in old Nokia (and also Lumia starting from the 2nd generation), old Samsung (2012 Chromebooks), old Sony Ericsson (2010 and 2011 Xperias), Sony (PlayStation Vita) and the OnePlus One I used to own before migrating to a Nexus 6 for use with Project Fi.

    The newer CTIA/AHJ wiring standard reverses the last two mentioned, so it calls for Tip to be used for left audio, Ring 1 to be used for right audio, ring 2 to be used for ground, and the sleeve to be used for microphone. According to my research, this newer CTIA/AHJ wiring standard is used in products from Apple, HTC, latest Nokia, latest Samsung, Jolla, Sony (Dualshock 4), Microsoft (including Surface, Lumia, and XboxOne controller with chat adapter) and most Android phones.

From this, it appears that your devices are using different standards, though it's difficult to say which device is using which standard , but Moto being the older phone is probably using the older standard while LG is using newer standard.

Pictorial representation (see for discussion on more phones including Apple )

enter image description here

Problems in connection are around Ground - since mic and ground are different in both standards. See also from SE.Electronics Hacking a TRRS to TRS adapter

Solutions

Samples of the last two options are linked at the end of blog here

Before you invest money, you can possibly verify by swapping the ground and mic , see this example from SE.Electronics

Edit: Post your edit today , saw This you tube video suggests that Wireless TRRS microphone adaptor worked to fix the wireless problem on LG V 10. I don't have any details on that or why it works but maybe worth giving it a shot considering, it's not expensive

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  • actually, i was unable to find out the reason till date :( wired lavalier mic works with LG, but not with MOTO. the Reciever works with MOTO, but not with LG.. The difference between wired and "electrically outputed" voice is that maybe MOTO works with electrically recieved sound, but LG not. because, the wired microphone needs to get some power from applicance, and LG does that and powers the wired MIC.. but LG seems to have problems when the "electrically powered voice" is sent to it... well, quite frustrating for me :(
    – T.Todua
    Commented Jul 31, 2017 at 10:51
  • when I hear it softly that is normal with a voice that comes out from appliance (because appliance powers the outputed voice), as oppesed to wired mic, which doesnt output anything, unless it gets some power from a connected-to appliance..
    – T.Todua
    Commented Jul 31, 2017 at 10:54
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    This is such niche information at this point, but I wanted to give you a thanks. I bought an old 2.5mm male to 3.5mm female adapter with in-line mic off ebay. It's an LG SGEY0003602. I can't find anything like it anywhere, nor anything modern that is similar. It turns out, it must be OMTP, and unfortunately, the 2.5mm female to 3.5mm male adapter I bought on Amazon is NOT an OMTP to CTIA; therefore it's not compatible with my Surface Book or my Samsung Galaxy S7 Edge. But, hopefully, if I can hunt down a 2.5mm female OMTP to 3.5mm male CTIA adapter, it will work.
    – brandeded
    Commented Jan 31, 2019 at 0:47

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