Wiring a jack plug for mono with stereo signal.

Discussion in 'Computer Support' started by Nottnick, Oct 24, 2005.

  1. Nottnick

    Nottnick Guest

    Can anyone help as I want to get this right.

    I want to take the stereo signal from my pc and feed it into the mono input
    on a mixing desk.

    Am I right in thinking that I need to solder both signal wires (ie from tip
    and ring of output jack)) together to the tip of the input mono jack. The
    groung left as normal.


    Nottnick, Oct 24, 2005
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  2. Nottnick

    kenny Guest


    If you compare this:
    http://images.tigerdirect.com/SKUimages/medium/C184-03174.jpg (mono)
    with this:

    you will see that actually the tip is common in the both the stereo and the
    What makes the difference between the stereo and the mono is that the stereo
    has 2 rings in the place on one ring that the mono has.
    Either you get a mono jack and connect the cables to it,
    or you get a stereo jack and you connect (solder) the 2 rings together (from
    the inside of course with the wires).
    OR you get a stereo to mono adaptor... so the same cable can serve as a
    stereo or a mono,
    (with the extension). look here:

    kenny www.computerboom.com

    Desire and expectation rolled into one.
    Ambrose Bierce1842-1914
    kenny, Oct 24, 2005
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  3. You risk distortion, if the pc output is low impedance (can drive
    headphones). Two resistors are necessary for decoupling. Their value
    depends upon the input impedance of your mixer, but usually some
    10kOhms should be fine.
    Walter Mautner, Oct 24, 2005
  4. Nottnick

    why? Guest

    You don't mono is 1 channel and stereo is 2.

    Get a better mixing desk.

    Better yet, get some software on the PC to mix the audio into mono.
    No. Think about it a bit more.

    You may not believe this but there are lots of audio sites, cables ,
    cable diagrams software , most likely audio newgroups like
    rec.audio.tech, it's a common question.

    Try a search search engine.

    You will also find info for hacked cables, stereo to mono with a few
    resistors and quite a few ascii art diagrams.

    why?, Oct 24, 2005
  5. Nottnick

    fred-bloggs Guest

    I would take the stereo PC signal to 2 mono inputs on the mixer and then
    convert to mono within the mixer, if mono's what you want.
    fred-bloggs, Oct 24, 2005
  6. Nottnick

    Brian Guest

    says the biggest google bitch around!
    Brian, Oct 24, 2005
  7. Howdy!

    Ahem. No, the BARREL is common. Tip is one signal, and if there's
    a ring or several rings, those are others. Stereo usually has tip, ring,
    barrel. Mono has tip and barrel.
    Terminology - Mono has NO rings. Stereo has ONE ring.

    That "other ring"? Is called a barrel.

    Ralph Wade Phillips, Oct 25, 2005
  8. Nottnick

    Shel-hed Guest

    My thoughts exactly. I just saw a mixer for sale for $10!
    m.i.d. -
    [email protected]
    Shel-hed, Oct 25, 2005
  9. Nottnick

    Nottnick Guest

    Thanks everyone for all advice.

    It all makes sense.

    Nottnick, Oct 25, 2005
  10. Nottnick


    Jan 26, 2011
    Likes Received:
    Stereo Source to Mono Jack


    I've attached a wiring diagram for a simple solution to your problem. Simply connect one output (left or right) to pin 2 of the XLR jack, and the other output to pin 3. Don't connect anything to pin 1. If your cable is long, though, you might want to use a shielded 2-conductor cable, and connect the shield to pin 3 of the XLR jack ONLY on that end, NOT on the source end.

    If this doesn't work, let me know, I'll try to help.

    Good luck!


    Attached Files:

    tspecht, Jan 26, 2011
  11. Nottnick


    Oct 31, 2011
    Likes Received:
    Use 2 channels !

    For those who may read this post now...

    The idea of converting a stereo sound to mono one is exactly "mixing" (you mix, i.e. add, left and right to mono), and therefore a mixing desk is exactly the necessary stuff.

    Most professionnal mixing desk use mono channels (except DJ's mixing desks which try to simplify manipulation, using stereo channels). If you plan to mix stereo sound, you must usually use two channels of your professionnal mixing desk. One for left, one for right. It is a very standard need, and many cables are designed in such a way : making a stereo channel into two mono channels. For example http://www.soundlightuk.com/shop/product_images/i/670/cabl51-wf0__63539_zoom.jpg .

    Once your two channels enter in your mixing desk, you may decide to keep the stereo (you pan 100% to left 1st channel and 100% to right second channel), or you may go to mono by panning your two channels to middle...

    Of course you may sum left and rigth by simply soldering both on a same pin, before entering in your mixing desk, but you may obtain some strange behaviour because it may generate side effects in the source system...
    nico, Oct 31, 2011
  12. Nottnick


    Nov 12, 2011
    Likes Received:
    Stereo Microphone 1/8 jack wired/connected for mono output

    Here's a Rube Goldberg situation:

    I have a small (lapel mic size) stereo microphone for a recording Sony Walkman. A great little microphone in its day. There is a 1/8" stereo 1/8" plug solidly set in the housing - there may be no way to get it out it without damaging the microphone.

    I want to put the microphone inside a Dobro resonator to get the metal cone sound. (Yes, it's been tried successfully, and I'm pursuing other options...)

    Then I want to run the output mono into a PA system - either XLR or TS 1/4" phone plug. I'd prefer a phone plug so I can use effects boxes.

    Tell me it's not hopeless...

    roadrage1125, Nov 12, 2011
  13. Nottnick


    Apr 10, 2009
    Likes Received:
    Belgrade, Serbia
    Classic thread, nice!..:) Thank God those days are behind us!! =)

    nimd4, Nov 17, 2011
  14. Nottnick

    Feb 21, 2012
    Likes Received:
    Over the years, I have been separating the left & rights of audio sources and using separate channels on various PA's to preserve the overall sound.
    I always thought that this was necessary due to the left / right signals having inherent 'opposition'. The alternative has been to lose one channel, which isn't a good option anyway.

    If, indeed, the 3.5mm stereo TRS plug to XLR works ok, then that resolves a few issues. I've just purchased a 3.5mm TRS to XLR convertor and will report back.

    Tspecht - Thanks for a diagram - the devil is in the detail!!
    I was wondering why pin 1 of the XLR is not used in the above diagram, and how the stereo signal becomes combined within the XLR of the mixer / sound gear. (and I am not doubting you - just interested in knowing!)
    , Feb 21, 2012
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