Thanks for that, that got audio working!
For the videos, I had to register the files, whatever that REG file is doing, didn't do the job right.
regsvr32 C:\Windows\SysWOW64\ir41_32.ax
regsvr32 C:\Windows\SysWOW64\ir32_32.dll
regsvr32 C:\Windows\SysWOW64\ir41_qc.dll
regsvr32 C:\Windows\SysWOW64\ir41_qcx.dll
regsvr32 C:\Windows\SysWOW64\ir50_32.dll
regsvr32 C:\Windows\SysWOW64\ir50_qc.dll
regsvr32 C:\Windows\SysWOW64\ir50_qcx.dll
I think only the .ax file mattered but I did them all anyway.