I think I forgot to remove "Mixer=hex:0x1B" from the WRT_M4-3.ini file on my 3rd modded idt 6427 driver - it should not really be there.
anyways, I'm done modding the 64xx drivers for now as it seems those drivers cannot handle the STAC9205 / 92HD005 audio chips
IDT never made any updated INI config files for STAC9204/STAC9205 in the 2010s as those were discontinued in 2008 or 2009
here's the modded IDT audio 6.10.5939.0 driver I've made for the M4300
I may also consider making an experimental IDT audio 6.10.6314.0 SB X-FI Dell mod, which is different from fis6h's modded 6314 driver
might have my 6314 mod up sometime next week
Windows Registry Editor Version 5.00
I have no current iGPU handy to check what happens...
All i know is that "Google Street View" looks crappy with HW scheduling using my NVIDIA GPU 💩