Windows 10: Crackling sound on center, rear-left, & rear-right speakers with ffdshow audio dolby...

I use my PC in my lounge room connected to a set of 5.1 speakers and a TV tuner and use it to watch TV Happauge! WinTV-HVR-935 Quad Mode TV Tuner + WinTV 10 app and Blu-Ray movies that I format-shift, losslessly, from the discs I own to single MKV files for Smooth Video Project 4 Pro to work with MPC-BE x64 or MPC-HC x64. I also use it for gaming and as a home arcade with the Multiple Arcade Machine Emulator with an arcade stick and a rotatable 27" 170Hz 1440p G-Sync Compatible IPS monitor.When I used to watch Blu-Ray moves on MPC-BE and MPC-HC. I always used the "Dolby decoder" option in

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Audio Problem: all of a sudden the sound only goes to the left, right, and sub woofer, there is no sound coming from the center, rear left and right speakers.

I have a logitech 5 speaker system being a left,right,sub,rear right, and rear left speaker. All the speakers connect to the sub and from the sub there is the green, orange, and black cord that plugs into the back of the computer. The other day I moved my
computer to a different room and now all of a sudden the sound only goes to the left, right, and sub woofer, there is no sound coming from the center, rear left and right speakers. They all still work because I did the sound test and they make the sounds.
When I click on the speakers tab on the sound menu it says jack information and the only one it shows is the green one. I'm not sure why unpluging it I guess messed up the settings.

OP - Audio Problem:

 

No sound from rear speakers

Sorry for your troubles. All I can suggest is to check the drivers to make sure all is current and correct, and then to check settings to make sure all of your channels (front left, center, front right, rear left, rear right) are properly assigned and working. If I were in your shoes, I would uninstall the audio drivers, then reinstall them to see if that helps. Otherwise clueless, so forgive my suggestions if they prove unhelpful.
Best wishes for a speedy resolution,
--Ed--

 

Audio playback on rear and center speakers is not working.

I've tried both of the methods you suggested and it still didn't work, however when I go to configure the speakers and test them the rear ones work fine but only in the test and the center speaker does nothing.