Windows 10: Speakers Realtek High Definition AudioSST Not working after upgrade from Windows 10 to 11

In Device Manager under Audio Inputs and Outputsevice settings for SWD\MMDEVAPI\{0.0.0.00000000}.{72059419-7151-4fe0-8a8c-48df61df33fd} were not migrated from previous OS installation due to partial or ambiguous device match. Last Device Instance Id: SWD\MMDEVAPI\{0.0.0.00000000}.{0331f8a7-5dbb-40d3-87be-cc15615923cf} Class Guid: {c166523c-fe0c-4a94-a586-f1a80cfbbf3e} Location Path: Migration Rank: 0xF00000000000F120 Present: false Status: 0xC0000719 -------------------------------------------------------------------------------------------Device SWD\MMDEVAPI\{0.0.0.00000000}.{72059419-715

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[SOLVED] Windows 10 Realtek 'Speaker Fill' not working

Ever since upgrading to Windows 10, "Speaker Fill" on Realtek audio chips has not worked (8## and 11##) for me. The rear channels are dead silent, even with +15 dB boost from the amplifier and +12 dB boost from the Realtek software. The speakers do work because when you do the channel sound test, both rear speakers sound exactly as they should. It's specifically the "Speaker Fill" feature that isn't working. I tried the 5.1 option (what I have) and the 7.1 option and both are just as silent.

Has anyone else encountered this problem? Has anyone found a solution?

Edit: See this post for workaround!

 

Realtek High Definition Sound Problem

I installed Win10 last night. My REALTEK HIGH DEFINITION SPEAKERS now do not function. There is no sound at all. Is this a Windows 10 error, or is there something else that I should look at? I was on Windows 7 on a Dell Inspiron desktop. Sound was working
wonderfully before upgrading. Any help would be muchly appreciated.

 

Microsoft High Definition Audio Device Driver Abruptly Stopped Working

I tried the steps you suggested, but the symptoms remain the same. I HAVE to use the Realtek driver to get any sound to my external speakers. The Microsoft High Definition Audio will get sound to my laptop's onboard speakers, but not out the line out.
The Realtek driver still has the delay at the beginning of playing any audio. I found that the the Plug and Play service was not set to automatic, so I changed it so it now does, but of possible significance is that there is no "Multimedia Class Scheduler"
on my list of services. Please advise.