[wdmaudiodev] Re: Audio Enhancements Problem

  • From: "Matthew van Eerde" <dmarc-noreply@xxxxxxxxxxxxx> (Redacted sender "Matthew.van.Eerde" for DMARC)
  • To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
  • Date: Fri, 1 Nov 2019 15:12:01 +0000

No, it’s perfectly valid APO behavior to emit silence on output even if the 
input is nonsilent.

From: Artem<mailto:smirnoff.artem@xxxxxxxxx>
Sent: Thursday, October 31, 2019 1:37 AM
To: wdmaudiodev@xxxxxxxxxxxxx<mailto:wdmaudiodev@xxxxxxxxxxxxx>
Subject: [wdmaudiodev] Re: Audio Enhancements Problem

Also it seems to me (but probably that is coincedence), if APO has
valid sound data on input and output
zeros (silence) Windows also sets this. Is that true?

regards,
Artem

On Wed, 30 Oct 2019 at 18:24, Matthew van Eerde
<dmarc-noreply@xxxxxxxxxxxxx> wrote:


https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.microsoft.com%2Fen-us%2Fwindows%2Fwin32%2Fcoreaudio%2Fpkey-audioendpoint-disable-sysfx&amp;data=02%7C01%7CMatthew.van.Eerde%40microsoft.com%7C08d143a6368541ff133508d75ddd84a0%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637081078320025871&amp;sdata=Y%2BlDPcpT7YfxKF3WKWfpLgJoHIvQ4%2BOBmrhH8h38vFI%3D&amp;reserved=0



If an SFX, MFX, EFX, LFX, or GFX returns a failure too often, or throws too 
many exceptions, Windows will automatically set this to 
ENDPOINT_SYSFX_DISABLED, which will prevent any SFX/MFX/EFX/LFX/GFX from 
being loaded on that audio endpoint.



From: Artem
Sent: Wednesday, October 30, 2019 8:07 AM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Audio Enhancements Problem



Hi!

During APO development sometimes I found that APO was not loaded because
Windows had set "PKEY_AudioEndpoint_Disable_SysFx" property to "1". And some
dialogue like "Would you like to re-enable them (enhancements)" appeared.

What are the conditions that property is set by Windows Audio Engine?

regards,
Artem
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