Hi, I have installed the sample sAPO provided by Microsoft using sysFx.inf and it has successfully installed In the render path. Next I tried doing the same in capture path too so that the entire path will be complete so that We can do some modifications like AEC etc. The problem is that the LFX on the capture path is not getting installed. Meaning, as the sysFx.doc says, the entries in the following registry path : "HKLM\SYSTEM\ControlSet001\Control\Deviceclasses\6994AD04-93EF-11D0-A3CC -00A0C9223196 \FX\0" Is not getting migrated to the following path in the registry : "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\MMDevices\Audio\Capture\ Endpoint\FxProperties" The modified version of the sysFx.inf file is as pasted below. The ones in bold is the changes I made for the capture path : [Version] Signature="$Windows NT$" Class=MEDIA ClassGUID={4d36e96c-e325-11ce-bfc1-08002be10318} provider=%ProviderName% CatalogFile=SysFxSample.cat DriverVer=02/08/2007,6.00.2246.1 [SourceDisksNames] 222=%DiskDescription%,,, [SourceDisksFiles] SwapAPO.dll=222 PropPageExt.dll=222 [DestinationDirs] SfxFx.CopyList=11 ; %windir%\system32 [Manufacturer] %MfgName%=MfgModelSection, ntx86, ntia64, ntamd64 ;; Excluding drivers from the "Add New Hardware" list. Uncomment this when shipping your product. ;; [ControlFlags] ;; ExcludeFromSelect = * [MfgModelSection.NTx86] %HdAudioFunctionDriver.CMedia9880.DeviceDesc%=HDAudio.SysFx,HDAUDIO\FUNC _01&VEN_434D&DEV_4980 [MfgModelSection.NTia64] %HdAudioFunctionDriver.CMedia9880.DeviceDesc%=HDAudio.SysFx,HDAUDIO\FUNC _01&VEN_434D&DEV_4980 [MfgModelSection.NTamd64] %HdAudioFunctionDriver.CMedia9880.DeviceDesc%=HDAudio.SysFx,HDAUDIO\FUNC _01&VEN_434D&DEV_4980 ;; ;; Include/Need sections from OS installed hdaudio.inf file ;; [HDAudio.SysFx] Include=ks.inf, wdmaudio.inf, hdaudio.inf Needs=KS.Registration, WDMAUDIO.Registration, HdAudOEM.CopyFiles, HdAudOEM.AddReg CopyFiles=SfxFx.CopyList AddProperty=OEMCustomBranding.AddProperty RegisterDlls=SfxFx.RegisterDlls [OEMCustomBranding.AddProperty] ;; ;; PKEY_DriverPackage_BrandingIcon, could also use {CF73BB51-3ABF-44A2-85E0-9A3DC7A12132},7,,,"PropPageExt.dll,-200" ;; DeviceBrandingIcon,,,,"%1%\PropPageExt.dll,-200" ;; ;; PKEY_DrvPkg_VendorWebSite, could also use {CF73BB51-3ABF-44A2-85E0-9A3DC7A12132},3,,,"http://www.microsoft.com/whd c/device/audio/default.mspx" ;; DeviceVendorWebSite,,,,"http://www.xyz.com"; ; Place your URL here ;; ;; Include/Need sections from OS installed hdaudio.inf file ;; [HDAudio.SysFx.HW] Include=hdaudio.inf Needs=HdAudModel.HW [HDAudio.SysFx.Interfaces] AddInterface=%KSCATEGORY_AUDIO%,%KSNAME_eLineOutWave%, HDAudio.SysFx.PrimaryLineOutWave AddInterface=%KSCATEGORY_RENDER%,%KSNAME_eLineOutWave%, HDAudio.SysFx.PrimaryLineOutWave AddInterface=%KSCATEGORY_AUDIO%,%KSNAME_eLineOutTopo%, HDAudio.SysFx.PrimaryLineOutTopo AddInterface=%KSCATEGORY_TOPOLOGY%,%KSNAME_eLineOutTopo%, HDAudio.SysFx.PrimaryLineOutTopo AddInterface=%KSCATEGORY_AUDIO%,%KSNAME_eMicInWave%, HDAudio.SysFx.PrimaryMicInWave AddInterface=%KSCATEGORY_CAPTURE%,%KSNAME_eMicInWave%, HDAudio.SysFx.PrimaryMicInWave AddInterface=%KSCATEGORY_AUDIO%,%KSNAME_eMicInTopo%, HDAudio.SysFx.PrimaryMicInTopo AddInterface=%KSCATEGORY_TOPOLOGY%,%KSNAME_eMicInTopo%, HDAudio.SysFx.PrimaryMicInTopo [HDAudio.SysFx.PrimaryLineOutWave] AddReg = HDAudio.SysFx.PrimaryLineOutWave.AddReg [HDAudio.SysFx.PrimaryLineOutWave.AddReg] HKR,,FriendlyName,,%PrimarySpeakerWaveDeviceName% HKR,,CLSID,,%Proxy.CLSID% [HDAudio.SysFx.PrimaryLineOutTopo] AddReg = HDAudio.SysFx.PrimaryLineOutTopo.AddReg, SysFx.AddReg, OEMSettingsOverride.AddReg [HdAudModel.PrimaryLineOutTopo.AddReg] HKR,,FriendlyName,,%PrimarySpeakerTopoDeviceName% HKR,,CLSID,,%Proxy.CLSID% [HDAudio.SysFx.PrimaryMicInWave] AddReg = HDAudio.SysFx.PrimaryMicInWave.AddReg [HDAudio.SysFx.PrimaryMicInWave.AddReg] HKR,,FriendlyName,,%PrimaryMicWaveDeviceName% HKR,,CLSID,,%Proxy.CLSID% [HDAudio.SysFx.PrimaryMicInTopo] AddReg = HDAudio.SysFx.PrimaryMicInTopo.AddReg, SysFx1.AddReg, OEMSettingsOverride1.AddReg [HdAudModel.PrimaryMicInTopo.AddReg] HKR,,FriendlyName,,%PrimaryMicInTopoDeviceName% HKR,,CLSID,,%Proxy.CLSID% [HDAudio.SysFx.Services] Include=hdaudio.inf Needs=HdAudModel.Services ;; ;; All FX\\0 entries in the same grouping ;; [SysFx.AddReg] HKR,"FX\\0",%PKEY_ItemNameDisplay%,,%SYSFX_FriendlyName% HKR,"FX\\0",%PKEY_SYSFX_PreMixClsid%,,%SYSFX_PREMIX_CLSID% HKR,"FX\\0",%PKEY_SYSFX_PostMixClsid%,,%SYSFX_POSTMIX_CLSID% HKR,"FX\\0",%PKEY_SYSFX_UiClsid%,,%SYSFX_UI_CLSID% HKR,"FX\\0",%PKEY_SYSFX_Association%,,%KSNODETYPE_ANY% ; GUID NULL means install on all endpoints ; supply a specific GUID to install on a particular bridge pin node type [SysFx1.AddReg] HKR,"FX\\0",%PKEY_SYSFX_CAPTURE_LFX_CLSID%,,%SYSFX_CAPTURE_LFX_CLSID% HKR,"FX\\0",%PKEY_SYSFX_UiClsid%,,%SYSFX_UI_CLSID% HKR,"FX\\0",%PKEY_SYSFX_Association%,,%KSNODETYPE_MICROPHONE% ; GUID NULL means install on all endpoints HKR,"FX\\0",%PKEY_FX_ID%,,"MicIn" HKR,"FX\\0",%PKEY_FX_FriendlyName%,,%SYSFX_FriendlyName% ;; ;; All EP\\0 entries in the same grouping ;; ;; Set default format to 48kHz, 16-bit, Stereo ;; Add endpoint extension property page ;; [OEMSettingsOverride.AddReg] HKR,"EP\\0", %PKEY_AudioEndpoint_Association%,,%KSNODETYPE_SPEAKER% HKR,"EP\\0", %PKEY_AudioEngine_OEMFormat%, %REG_BINARY%, 41,00,8C,70,28,00,00,00,FE,FF,02,00,80,BB,00,00,00,EE,02,00,04,00,10,00, 16,00,10,00,03,00,00,00,01,00,00,00,00,00,10,00,80,00,00,AA,00,38,9B,71 HKR,"EP\\0", %PKEY_AudioEndpoint_Ext_UiClsid%,,%AUDIOENDPOINT_EXT_UI_CLSID% [OEMSettingsOverride1.AddReg] HKR,"EP\\0", %PKEY_AudioEndpoint_Association%,,%KSNODETYPE_MICROPHONE% HKR,"EP\\0", %PKEY_AudioEngine_OEMFormat%, %REG_BINARY%, 41,00,8C,70,28,00,00,00,FE,FF,02,00,80,BB,00,00,00,EE,02,00,04,00,10,00, 16,00,10,00,03,00,00,00,01,00,00,00,00,00,10,00,80,00,00,AA,00,38,9B,71 HKR,"EP\\0", %PKEY_AudioEndpoint_Ext_UiClsid%,,%AUDIOENDPOINT_EXT_UI_CLSID% ;; ;; Copy custom SYSFX and property page ;; [SfxFx.CopyList] SwapAPO.dll,,,0x0100 PropPageExt.dll,,,0x0100 ;; ;; Register custom SYSFX and property page ;; [SfxFx.RegisterDlls] 11,,SwapAPO.dll,1 11,,PropPageExt.dll,1 [Strings] ProviderName="xyz" MfgName="xyz" DiskDescription="Sample Installation Media" HdAudioFunctionDriver.CMedia9880.DeviceDesc = "xyz 13thAug07-13:11 - CMedia 9880 HD Audio Codec with Swap System Effect" ;; ;; These are the strings passed to PcRegisterSubdevice for wave ports ;; KSNAME_eLineOutWave = "eLineOutWave" KSNAME_eLineOutTopo = "eLineOutTopo" ;;KSNAME_eMicInWave = "eMicInWave" ;;KSNAME_eMicInTopo = "eMicInTopo" KSNAME_eMicInWave = "MicInWave" KSNAME_eMicInTopo = "MicInTopology" ;; ;; These are the name strings for the wave miniports displayed in mmsys.cpl ;; PrimarySpeakerWaveDeviceName = "HD Audio Speaker" PrimarySpeakerTopoDeviceName = "HD Audio Speaker mixer" PrimaryMicWaveDeviceName = "HD Audio Mic" PrimaryMicInTopoDeviceName = "HD Audio Speaker mixer" ;; ;; PropertyKey GUIDS ;; PKEY_SYSFX_Association = "{D04E05A6-594B-4FB6-A80D-01AF5EED7D1D},0" PKEY_SYSFX_PreMixClsid = "{D04E05A6-594B-4FB6-A80D-01AF5EED7D1D},1" PKEY_SYSFX_PostMixClsid = "{D04E05A6-594B-4FB6-A80D-01AF5EED7D1D},2" PKEY_SYSFX_UiClsid = "{D04E05A6-594B-4FB6-A80D-01AF5EED7D1D},3" PKEY_FX_ID = "{D04E05A6-594B-4FB6-A80D-01AF5EED7D1D},9" PKEY_FX_FriendlyName = "{D04E05A6-594B-4FB6-A80D-01AF5EED7D1D},4" PKEY_ItemNameDisplay = "{B725F130-47EF-101A-A5F1-02608C9EEBAC},10" PKEY_AudioEndpoint_Ext_UiClsid = "{1DA5D803-D492-4EDD-8C23-E0C0FFEE7F0E},1" PKEY_AudioEndpoint_Association = "{1DA5D803-D492-4EDD-8C23-E0C0FFEE7F0E},2" PKEY_SYSFX_CAPTURE_LFX_CLSID = "{D04E05A6-594B-4FB6-A80D-01AF5EED7D1D},1" PKEY_AudioEndpoint_ControlPanelPageProvider = "{1DA5D803-D492-4EDD-8C23-E0C0FFEE7F0E}" ;; ;; PKEY_AudioEngine_OEMFormat: Specifies the default format that is used for rendering/capturing. ;; vartype = VT_BLOB ;; PKEY_AudioEngine_OEMFormat = "{E4870E26-3CC5-4CD2-BA46-CA0A9A70ED04},3" AUDIOENDPOINT_EXT_UI_CLSID = "{6C57B2A2-91F5-4b90-93D5-FAB82485ECA6}" SYSFX_UI_CLSID = "{19166F23-5F08-47F9-BB57-9F57A977D88E}" SYSFX_PREMIX_CLSID = "{B48DEA3F-D962-425a-8D9A-9A5BB37A9904}" SYSFX_POSTMIX_CLSID = "{06687E71-F043-403A-BF49-CB591BA6E103}" SYSFX_CAPTURE_LFX_CLSID = "{061E338A-F24D-496C-BCCC-7B4E361F19ED}" SYSFX_FriendlyName = "Swap System Effect" KSCATEGORY_AUDIO = "{6994AD04-93EF-11D0-A3CC-00A0C9223196}" KSCATEGORY_RENDER = "{65E8773E-8F56-11D0-A3B9-00A0C9223196}" KSCATEGORY_CAPTURE = "{65E8773D-8F56-11D0-A3B9-00A0C9223196}" KSCATEGORY_TOPOLOGY = "{DDA54A40-1E4C-11D1-A050-405705C10000}" KSNODETYPE_ANY = "{00000000-0000-0000-0000-000000000000}" KSNODETYPE_SPEAKER = "{DFF21CE1-F70F-11D0-B917-00A0C9223196}" KSNODETYPE_MICROPHONE = "{DFF21BE1-F70F-11D0-B917-00A0C9223196}" Proxy.CLSID = "{17CCA71B-ECD7-11D0-B908-00A0C9223196}" REG_BINARY = 0x00000001 I have done a comparison with other similar vendors who have created an inf file for installing sAPO ( lfx in the capture path) and things look the same to what changes I have done to my inf file. But I stil feel the problem lies in the installation of the lfx thru the inf file only. Can anyone please help me out in this regard??? Thanks in advance. Venkat.R.N.