From analyzing the 6.0.9273.x branch, build 6092731 includes:
Depending on the OEM customization of the motherboard or laptop, this driver enables pass-through support for: realtek high definition audio driver 6092731
The DCH driver hides many features by default. To unlock them: From analyzing the 6
: Supports higher kHz and bit rates (e.g., 96kHz or 192kHz) for sharper, more detailed playback compared to legacy AC97 standards. From analyzing the 6.0.9273.x branch