I've created an APO & inf file and installed it along with standard
USB audio driver for some USB headphones.
On Fri, 20 Sep 2019 at 18:33, Matthew van Eerde
<dmarc-noreply@xxxxxxxxxxxxx> wrote:
******************
Neither of the Microsoft USB Audio class drivers come with an EFX, so I’m
confused.
________________________________
From: wdmaudiodev-bounce@xxxxxxxxxxxxx <wdmaudiodev-bounce@xxxxxxxxxxxxx> on
behalf of Artem <smirnoff.artem@xxxxxxxxx>
Sent: Thursday, September 19, 2019 11:17:01 PM
To: wdmaudiodev@xxxxxxxxxxxxx <wdmaudiodev@xxxxxxxxxxxxx>
Subject: [wdmaudiodev] Re: APO in EFX can't be disabled?
I'm using standard checkbox on the Advanced tab. Also the driver is
standard Microsoft USB Audio driver.
Thanks, I'll try to compile Audio effects discovery sample.
On Thu, 19 Sep 2019 at 18:28, Matthew van Eerde
<dmarc-noreply@xxxxxxxxxxxxx> wrote:
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Is the “disable all enhancements” checkbox in question on the Advanced tab
or on an audio-driver-provided enhancements tab?
If it’s on the Advanced tab, it controls the
PKEY_AudioEndpoint_Disable_SysFx property.
https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.microsoft.com%2Fen-us%2Fwindows%2Fwin32%2Fcoreaudio%2Fpkey-audioendpoint-disable-sysfx&data=02%7C01%7CMatthew.van.Eerde%40microsoft.com%7C4d2a46cf07424b397f1e08d73d92404d%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637045570665898123&sdata=Vko%2Faz939qHy6f%2BAyMNNrPswORj6C6oiHQUwM7VJhYs%3D&reserved=0
If it’s on an audio-driver-provided enhancements tab, then the checkbox
does whatever the audio driver author wants it to do – hopefully this is
also to control the PKEY_AudioEndpoint_Disable_SysFx property.
Some audio processing is so essential that to turn it off risks physical
damage to the system it’s running on. In particular, if an APO advertises
that it performs speaker protection, we won’t disable it, even if the
property is set.
You can run the Audio effects discovery sample or audio effects discovery
HLK tests to see what effects are provided.
https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fcode.msdn.microsoft.com%2Fwindowsapps%2FAudio-effects-discovery-5fd65c15&data=02%7C01%7CMatthew.van.Eerde%40microsoft.com%7C4d2a46cf07424b397f1e08d73d92404d%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637045570665898123&sdata=zBTMziZtcZ7Gpg5zTTSGbsBSnaMiFuTG327EkiLqJfg%3D&reserved=0
https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdocs.microsoft.com%2Fen-us%2Fwindows-hardware%2Ftest%2Fhlk%2Ftestref%2F634e1f2a-de4f-4043-aa3c-ac43da164d11&data=02%7C01%7CMatthew.van.Eerde%40microsoft.com%7C4d2a46cf07424b397f1e08d73d92404d%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637045570665898123&sdata=AS%2BA9cfw9AWcjNq6vC84vyNbRZ9UPNfEQCk5cU%2FflaQ%3D&reserved=0
From: Artem
Sent: Wednesday, September 18, 2019 11:49 PM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] APO in EFX can't be disabled?
Hi!
In my experiments I've found that "Disable all enhancements" checkbox
in sound device property page doesn't influence loading of EFX APO,
so it is still gets loaded by audio subsystem.
Is this by design or a bug?
OS is Windows 10 with updates.
regards,
Artem
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