Mine is stock LG-H990DS and can confirm.
1) Generic Driver = ON
2) Generic Driver -> Hi-Res Codec = ON
3) Generic Driver -> Hi-Res Speaker = ON
4) DSP Effect (Device) = OFF
5) Low Latency = OFF
6) 32-bit Output (IEEE 754) = OFF
It seems max is 24 (64 internal)/192.
Tried playing higher bit rate files (dsd64, dsd128) and it remained at 24/192.
I can upsample lower rates to 24/192 :
Follow Source Frequency: OFF
Frequency: Choose highest supported
Will try to see when I trigger the Quad DAC option. Will update later...
Update: Tried high impedance mode, the same. SQ IMO still goes to internal Music Player.