a follow-up: it seems Realtek "already did the magic" themselves at least in the HDX_GigabyteExt_Creative_RTK.inf file by allowing simultaneous usage of Realtek sound FX options with Creative audio options (aka. having
multiple audio effects)
so I'm fortunate to using a Gigabyte board and having both Realtek Sound FX and Creative audio FX options available [that includes the Base Management, Subwoofer Swap & Room Correction options available for 5.1 & 7.1 speakers as in this lovely screenshot; Loudness equalization is not available but I don't need that one since Creative's "Smart Volume" feature does a similar thing]
View attachment 122631
perhaps when alanfox2000 does newer/future Realtek UAD/UWP + Creative UWP mods, he should take a closer look at the contents of the
HDX_GigabyteExt_Creative_RTK.inf file and compare the entries of other "creative extension inf" files like
HDX_AcerExt_CT_RTK.inf or
HDX_ClevoExt_CT_RTK.inf, especially the entries in the "APO CLSID registration for render endpoints" section.
The HDX_GigabyteExt_Creative_RTK.inf file has this entry in the "render endpoints" section:
"HKR,InterfaceSetting\SysCustomizedFx\FX\0,%PKEY_CompositeFX_ModeEffectClsid%,%REG_MULTI_SZ%,%MBAPO_MFX_CLSID%,%REALTEK_MFX_CLSID%"
instead of this in other CT_RTK or Creative_RTK extension INF files:
"HKR,InterfaceSetting\SysCustomizedFx\FX\0,%PKEY_CompositeFX_ModeEffectClsid%,%REG_MULTI_SZ%,%MBAPO_MFX_CLSID%"
also the Realtek OMFX clsid string was added onto the Gigabyte Creative RTK inf file:
"HKR,InterfaceSetting\SysCustomizedFx\FX\0,%PKEY_CompositeFX_Offload_ModeEffectClsid%,%REG_MULTI_SZ%,%REALTEK_OMFX_CLSID%"
that allows the Realtek MFX to be "offloaded" while using Creative audio options