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AV audio video red yellow white application

Discussion in 'Audio' started by morphingstar, Jun 23, 2015.

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  1. morphingstar

    morphingstar

    56
    1
    Mar 1, 2012
    I bought a set of AV transmitter receiver. Cinch (lotus) inputs, white, red, yellow.
    While testing it I discovered the yellow video input would handle audio signals.
    Used this way would make it a 3-channel audio transmission. Application stereo music + 1 microphone.
    Am I looking for trouble this way or am I just lucky having 3 x audio?
     
  2. davenn

    davenn Moderator

    13,577
    1,866
    Sep 5, 2009
    the yellow line is 99.9999% of the time the video input
    ie. it will be on your unit as well
    it will possibly work for audio but the circuitry isn't designed for that
     
  3. Gryd3

    Gryd3

    4,098
    875
    Jun 25, 2014
    Perhaps you are just lucky having 3 x audio... but perhaps you need more detail...
    White is almost always Left-Audio, Red is almost always Right-Audio.
    If a receiving unit.. (ie, a VCR) does not have a Red input, it treats the White Left-channel audio is 'Mono' which will be directed to both Left and Right speakers.

    What you need to determine is if the Audio that gets transmitted via the Yellow input is directed to the Left Channel, Right Channel or Both, or if it simply remains on the Yellow output of the AV transmitter receiver.
     
  4. ramussons

    ramussons

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    Jun 10, 2014
  5. davenn

    davenn Moderator

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    Sep 5, 2009
    uh huh ... personally I think its a really bad idea to stick audio into a video modulator and RF transmitter
     
  6. ramussons

    ramussons

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    Jun 10, 2014
    Technically speaking, you have a bandwidth of 3.8 / 4.43 MHz available which can be used for an analog signal ....... :rolleyes:
     
    Gryd3 likes this.
  7. AnalogKid

    AnalogKid

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    659
    Jun 10, 2015
    An analog signal that usually is asymmetrical about ground. The yellow input might have a DC clamp trying to figure out where the back porch is.

    ak
     
  8. ramussons

    ramussons

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    Jun 10, 2014
    Yes. So offset a DC 0f .5 Volts and Ensure p-p < 1.0 volt. Technically possible to transport Audio, but ...

     
  9. morphingstar

    morphingstar

    56
    1
    Mar 1, 2012
    Ok, thanks. It seems none of you has actually done it and checked the results.
    Detail answers:
    Audio into yellow TX appears at yellow RX. No crossover to white / red.
    <<DC clamp trying to figure out where the back porch>> No clue, it is an unbalanced input / output with signal and ground contact. (Obviously).
    The receiving unit is a stage music amplifier with 1/4Jacks.
    <<bad idea >> why, if it works? Facts, please. That is why I asked.

    I'll try it more. No warnings received based on facts. I'll let you know in a while what experience tells me. Thanks for now.
     
  10. davenn

    davenn Moderator

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    Sep 5, 2009
    that's video stuff that is taken care of in the video circuitry in the transmitter ( the circuitry that you are pumping audio into instead of video
     
  11. JWHassler

    JWHassler

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    16
    Dec 22, 2014
    The frequency-response of the video circuit might not go as low as you want for audio.
    But if you're happy with the sound, there's no harm done.
     
  12. AnalogKid

    AnalogKid

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    659
    Jun 10, 2015
    Decent video is flat down to 30 Hz.

    ak
     
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