PKEY_FX_Offload_ModeEffectClsid
In Windows 10, version 1511 and later, the PKEY_FX_Offload_ModeEffectClsid key identifies the mode effect (MFX) supported by the driver that will be loaded during offload playback. The driver developer should specify the list of supported processing modes that their driver supports.
The INF file property key instructs the audio endpoint builder to set the CLSIDs for mode APOs into the effects property store. This information is used to build the audio graph that will be used to inform upper level apps what effects are in place.
INF File Sample
An INF file specifies settings for an audio processing mode effect in the add-registry section for that device. The following INF example shows the strings and add-registry sections that loads the loads the APO for a mode effect to be used during offload playback into the registry.
[Strings]
PKEY_FX_Offload_ModeEffectClsid = "{D04E05A6-594B-4fb6-A80D-01AF5EED7D1D},12"
...
; Driver developers should replace this CLSIDs with that of their own APO
FX_MODE_CLSID = "{00000000-0000-0000-0000-000000000000}"
...
[SWAPAPO.I.Association0.AddReg]
HKR,"FX\\0",%PKEY_FX_Offload_ModeEffectClsid%,,%FX_MODE_CLSID%