how to control enable audio enhancements with code

Question

Hi all,
is there a way to disable the microphone audio enhancements from C++ code?
When the audio enhancement function is enabled, the microphone data collected by our software will be affected, resulting in problems such as echo can not be eliminated。
So I want to know if I can get and set the status of audio enhancement from C + + code。
Here is a picture showing the position of the switch

Answer 1

This simplified test with IPolicyConfig to update the Store works for me (Windows 10 21H1) =>
(I get 0, then I set to 1 and enhancements become disabled)

IMMDeviceEnumerator* pDeviceEnumerator;
HRESULT hr = CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_ALL, __uuidof(IMMDeviceEnumerator), (LPVOID*)&pDeviceEnumerator);
if (SUCCEEDED(hr))
{
 IMMDevice* pDefault;
 hr = pDeviceEnumerator->GetDefaultAudioEndpoint(eRender, eMultimedia, &pDefault);
 if (SUCCEEDED(hr))
 {
 LPWSTR pwstrEndpointId = NULL;
 hr = pDefault->GetId(&pwstrEndpointId);

 IPolicyConfig* pPolicyConfig;
 hr = CoCreateInstance(CLSID_PolicyConfig, NULL, CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&pPolicyConfig));
 if (SUCCEEDED(hr))
 {
 PROPVARIANT var;
 PropVariantInit(&var);
 hr = pPolicyConfig->GetPropertyValue(pwstrEndpointId, TRUE, PKEY_AudioEndpoint_Disable_SysFx, &var);
 var.uiVal = (USHORT)1;
 hr = pPolicyConfig->SetPropertyValue(pwstrEndpointId, TRUE, PKEY_AudioEndpoint_Disable_SysFx, &var);
 pPolicyConfig->Release();
 }
 }
 pDeviceEnumerator->Release();
}

At beginning :

#include <initguid.h>
#include <Mmdeviceapi.h>

DEFINE_GUID(CLSID_PolicyConfig, 0x870af99c, 0x171d, 0x4f9e, 0xaf, 0x0d, 0xe6, 0x3d, 0xf4, 0x0c, 0x2b, 0xc9);
MIDL_INTERFACE("f8679f50-850a-41cf-9c72-430f290290c8")
IPolicyConfig : public IUnknown
{
public:
 virtual HRESULT STDMETHODCALLTYPE GetMixFormat(PCWSTR pszDeviceName, WAVEFORMATEX** ppFormat) = 0;
 virtual HRESULT STDMETHODCALLTYPE GetDeviceFormat(PCWSTR pszDeviceName, bool bDefault, WAVEFORMATEX** ppFormat) = 0;
 virtual HRESULT STDMETHODCALLTYPE ResetDeviceFormat(PCWSTR pszDeviceName) = 0;
 virtual HRESULT STDMETHODCALLTYPE SetDeviceFormat(PCWSTR pszDeviceName, WAVEFORMATEX* ppEndpointFormatFormat, WAVEFORMATEX* pMixFormat) = 0;
 virtual HRESULT STDMETHODCALLTYPE GetProcessingPeriod(PCWSTR pszDeviceName, bool bDefault, PINT64 pmftDefaultPeriod, PINT64 pmftMinimumPeriod) = 0;
 virtual HRESULT STDMETHODCALLTYPE SetProcessingPeriod(PCWSTR pszDeviceName, PINT64 pmftPeriod) = 0;
 virtual HRESULT STDMETHODCALLTYPE GetShareMode(PCWSTR pszDeviceName, struct DeviceShareMode* pMode) = 0;
 virtual HRESULT STDMETHODCALLTYPE SetShareMode(PCWSTR pszDeviceName, struct DeviceShareMode* pMode) = 0;
 virtual HRESULT STDMETHODCALLTYPE GetPropertyValue(PCWSTR pszDeviceName, BOOL bFxStore, const PROPERTYKEY& pKey, PROPVARIANT* pv) = 0;
 virtual HRESULT STDMETHODCALLTYPE SetPropertyValue(PCWSTR pszDeviceName, BOOL bFxStore, const PROPERTYKEY& pKey, PROPVARIANT* pv) = 0;
 virtual HRESULT STDMETHODCALLTYPE SetDefaultEndpoint(PCWSTR pszDeviceName, ERole eRole) = 0;
 virtual HRESULT STDMETHODCALLTYPE SetEndpointVisibility(PCWSTR pszDeviceName, bool bVisible) = 0;
};

Answer 2

It is done with IPropertyStore and PKEY_AudioEndpoint_Disable_SysFx

Answer 3

Hi,

Welcome to Microsoft Q&A!

According to your description, whether you want to set this?

If so, I am afraid of that this is impossible.

Each endpoint has two property stores; the "endpoint property store" displayed above, and the "effects property store." The endpoint property store is exposed to applications, but the effects property store is limited to:

1) the audio driver

2) the audio engine

3) the Sound control panel.

So only the user can view / change settings in the effects property store, and that only through the Sound control panel.

And I suggest you could refer to the threads: https://social.msdn.microsoft.com/Forums/windowsdesktop/en-US/b028b430-48c5-434b-a644-da192fbf20a5/how-can-we-control-the-quotenhancementsquot-page-under-device-properties-page?forum=windowspro-audiodevelopment

https://social.msdn.microsoft.com/Forums/windowsdesktop/en-US/5830c1de-fc50-468b-9017-6a88b774a861/how-can-i-disable-microphone-enhancements-from-code?forum=windowspro-audiodevelopment

Best Regards,

Jeanine

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Answer 4

Hi,

Did anyone find a solution to this?

We are facing audio recording issues when the "Enabled audio enhanchments" is checked. The issue is quite serious as there are several seconds of empty recordings in-between. It only happens using Philips and Olympus dictaphones, but not when using a Jabra Evolve 40 UC headset.

Since our users are switching workplace computers all the time, we can simply not ask them to check/untick a box before starting their work, so I was hoping we could fix this in code somehow.

Looking forward to any replies!

Best regards,

Jens-Peter