Windows 10: Windows 10 Audio Issues (MME or WASAPI or DirectSound)

I'm running Windows 10 1903, the problem appeared after installing update KB4507453

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  The Windows Audio service wouldn't start, I solved the problem by changing the "log on as:" from user to local system account. Windows reports no error anymore but no sound coming out of my speakers (SPDIF)
  
  
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  The problem is not driver related, I reinstalled the drivers, downgraded to an older version and upgraded to the newest WHQL drivers, Windows reported no errors.
  
  
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  I tested my audio with Adobe Audition where audio is played by the [ASIO] library instead of the Windows [MME] system, the audio works perfect!
  
  
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  I installed the ASIO4all plugin in Winamp and also here audio plays perfectly.
  
  
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  So the problem lies on the Windows MME or WASAPI system (don't know what is actually used by Windows programs), in Audition the MME system reports: "The default output device is not responding and may be disconnected..."
  
  
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  In the Windows Sound configuration applet the in- and output devices appear as usual but no sound is detected in the microphone or no sound is outputted in the playback device when I play audio trough a DirectSound output (a normal Windows program).
  
  
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  When I try to play a test tone in the Advanced tab of the Windows Sound configuration applet I get an error dialog that says: "Failed to play test tone".
  
  
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  I tried uninstalling the update that caused the problem but without result. Reinstalling it also gave no result.
  
  
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  My previous Windows Image is from one month ago so I would prefer to solve the problem instead of reverting to the one month old image.
  

Are there any things I can do to investigate or solve my problem? Reinstalling Windows is no option for me as my Windows is highly customised in many many years.

:)

 

Win 10 1803 changes to WASAPI and WDM-KS?

Hello. I'm one of the developers for Performous (an opensource cross-platform karaoke game). For years now we've relied on PortAudio to handle audio output and input on Windows, Mac, and several flavors of Linux.

On Windows, we default to WASAPI but give the user a choice between MME, DirectSound, WDM-KS and WASAPI. Recently, it's been brought to our attention that WDM-KS and WASAPI are broken. PortAudio is failing with an "invalid number of channels" error when
trying to open an output device using either of those backends (note, this is OUTPUT, so it is not the microphone access issue)

I have done a cross-over test between the latest stable portaudio release (which is quite old) and the latest git master, as well as tried different versions of our software (newer builds v/s older ones known to work) on Windows 8 and Windows 10 1803. So
far the result is the same for every combination. Windows 10 1803 fails with the aforementioned error while other versions of Windows work fine.



So... what I wanted to know is whether there had been changes to these two audio APIs that have caused them to stop working and if so, whether these changes have been documented anywhere so whoever (either us or the portaudio developers) can begin looking
for a fix, or even if nothing changed in these APIs and this result is the result of a bug in this Windows release.

 

Cortana issue with WASAPI

Hi everyone, it's my first hours of using Cortana when I found it don't work with WASAPI.

Issue: When the audio device is being used exclusively, Cortana cannot open any apps.

In my case, I used MPC-HC with reclock using WASAPI exclusive output. I told Cortana to open "This PC" for me, but it stuck on the screen with Staring XXX and those little balls keep flying under the icon. I can click on the icon and the program is opened,
but this isn't what I wanted.

I understand Cortana cannot respond vocally, but shouldn't she continue the command even audio device is being used? It there any fix for this? (Don't tell me to give up WASAPI )

 

WASAPI can't see audio input of generic USB audio device


I have a very old Roland audio interface (UA1-EX) which I have to use in its generic USB audio mode because it is no longer supported by Roland. I have been able to get it working using ASIO4ALL and record from its audio input, albeit very poorly. So I decided to try using it with WASAPI. However in my DAW's audio device controls, the mic input of the interface is not listed, even though its ouput is. Why would the input of a generic USB audio device not be available in WASAPI?