Test on Latitude 9510 with 5.10.0-1020-oem kernel, BIOS: 1.4.2 with, codename: focal
1. enable proposed channel 2. $ sudo apt install alsa-ucm-conf 3. $ alsactl init 4. $ amixer cget name='rt715 ADC 07 Capture Volume' numid=14,iface=MIXER,name='rt715 ADC 07 Capture Volume' ; type=INTEGER,access=rw---R--,values=2,min=0,max=63,step=0 : values=58,58 | dBscale-min=-17.25dB,step=0.75dB,mute=0
And capture volume is improved.
Test on Latitude 9510 with 5.10.0-1020-oem kernel, BIOS: 1.4.2 with, codename: focal
1. enable proposed channel 14,iface= MIXER,name= 'rt715 ADC 07 Capture Volume' access= rw---R- -,values= 2,min=0, max=63, step=0 min=-17. 25dB,step= 0.75dB, mute=0
2. $ sudo apt install alsa-ucm-conf
3. $ alsactl init
4. $ amixer cget name='rt715 ADC 07 Capture Volume'
numid=
; type=INTEGER,
: values=58,58
| dBscale-
And capture volume is improved.