I have a 5.1 speaker system plugged into my Windows 7 machine.

After selecting both options for the 5.1 (rear L&R and side L&R), I still did not have output in either rear speaker when inside applications such as Media Player and Winamp.

The speaker test on both 5.1 options would play the correct sound out of the individual rear speakers, so they are wired up correctly.

I tried to configure Winamp to force 5.1 but did not have any success.

I now have it working; the solution was to check "Speaker Fill" (also see image).

Control Panel > Sound > Playback (tab) > Speakers > Properties >

Enhancements (tab) > check "Speaker Fill"

So my question is why is this apparent override necessary?

Is it an issue of the media (mp3, avi) I was testing not being encoded well (or at all) for 5.1 playback, a limitation of on-board 7.1 sound card?


  • Sound card is on board a Gigabyte EX58-UD5 motherboard.
  • Speakers are Logitech Z-640 5.1

Sound control panel screen shot:

Sound Enhancements - Speaker Fill


Yes this is because the audio source (mp3, avi) you used only has stereo (2 channel) audio. It is not a limitation of your sound hardware, speakers or Windows.

|improve this answer|||||

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.