Feature request: selection of digital filters, enabling NOS and DRE

[redr0ne]

It seems the HiBy R1, unlike the HiBy R3 Pro II, doesn't have detailed DAC settings. In the Play Settings section, there's no Digital Filter selection option, no option to enable or disable DRE, NOS, or perhaps anything else. Is it possible to restore all these missing settings?
Thanks in advance!

[redr0ne]

I'm also trying to change the digital filter via adb, as described here https://github.com/bidhata/Hiby-R1-Mod#digital-filters , but the changes don't seem to be applied. Music is paused, and I'm running with root privileges.

# amixer cget name='Digital Filter'
numid=4,iface=MIXER,name='Digital Filter'
  ; type=INTEGER,access=rw------,values=1,min=0,max=4,step=0
  : values=0
# amixer cset name='Digital Filter' = 4
numid=4,iface=MIXER,name='Digital Filter'
  ; type=INTEGER,access=rw------,values=1,min=0,max=4,step=0
  : values=0
# amixer cget name='Digital Filter'
numid=4,iface=MIXER,name='Digital Filter'
  ; type=INTEGER,access=rw------,values=1,min=0,max=4,step=0
  : values=0