Removing "line in" echo from Realtek HD Audio output (if it is not a sound effect)

By Swing Daddy
Mar 18, 2012
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  1. I just solved my own problem and thought others might benefit, since I could not find the solution using internet search.

    My Realtek HD Audio manager seemed to be creating an echo on my "Line In" audio signal. I had already set the 'environment' and 'equalizer' sound effects options to <None>, but the echo persisted. I found the problem seems that I was essentially duplicating the Line In audio stream.

    The first "source" I found was the HD Audio manager. You can open the manager and view the 'Line In' tab - mine had a non-zero playback volume (the slider was NOT all the way to the left for zero playback). If you want output from the HD Manager, that makes sense.

    I also found out a second Line In "source". It was in the 'Line In' properties settings where I had checked off the option to "Listen to this device." When I disabled that, the echo disappeared.

    To view this 'Line In' properties tab, right-click on the speaker icon in the notification area, then select Recording Devices (yes, "Recording"). Then, the tab will display in a window with the title 'Sound'. You should see the Line In device in the list. Right-click on this item and select Properties. The 'Line In' properties window pops up. Then select the 'Listen' tab. UNselect 'Listen to this device'. The echo should disappear if you're experiencing my problem.

    I hope this helps someone. I'm just trying to help the community from which I've received so much help. :grinthumb
    Mentor Milla likes this.
  2. Michelle929

    Michelle929 TS Rookie

    Two same signals

    You're doing the right thing... getting rid of the other input signal.
  3. Jason25

    Jason25 TS Rookie


    I have the same problem and I just came across this thread. Yes, unselecting 'Listen to this device' does get rid of the echo. However the sound isn't great compared to leaving it ticked (bar the echo). In sound properties, under the playback tab, if you disable all playback devices, sound is still coming from somewhere, what is it? Some default inner speaker? I take it that is what is causing the echo. Is there anyway to disable this?
  4. Gunga Din

    Gunga Din TS Rookie

    Thanks, Swing Daddy. Very helpful info!
  5. blahiblipblah

    blahiblipblah TS Rookie

    I also just fixed this by opening volume mixer, then clicking on the device icon, next the enhancements tab and selecting "none" under setting... Somehow it was set to sewer pipe even though I have never changed any settings.
  6. Pauly

    Pauly TS Rookie

    You may have a sample rate problem. I had the same echoey issue and mine was resolved with making sure the windows sample rate was the same as the Realtek HD sample rate. Both should be set to 16bit 48000Hz. Go to Control Panel > Sound > Speakers (Realtek Audio Device) > Properties > Advanced then select the above sample rate from the drop-down menu and apply. In the Realtek Menu (click on speaker icon in bottom right of Windows) Select the Default Format tab then make sure the same sample rate is listed in that drop-down menu.

    Hope this helps.
  7. MY SAVIOR !! I've been fighting this for hours. Was getting ready to do the dreaded rollback drivers until I came across this.


  8. joffrey

    joffrey TS Rookie

    For my two cents...downloading skype created my realtek echo and disabled the balance as well. Skype also created errors in my register which I had to use emerg disc to correct. Once Skype was removed and my reg errors corrected, the realtek sound and balance worked just fine :)

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