Hello,
I am using LibreELEC on RockPro64 (ROCKPro64 | PINE64).
On nightly build nightly-20210227-9c75e28 (RK3399.arm) I encountered problem from subject. 
If the audio output was directed to HDMI, the sound played nicely. When directed to jack output (alsa), it did not play at all.
It showed up it was muted and following steps fixed the issue:
Code
		
					
				# alsactl -f /storage/.config/asound.state store
# vi /storage/.config/asound.state
Change: 
...
    control.33 {
        iface MIXER
        name 'Left Headphone Mixer Left DAC Switch'
        value false
        comment {
            access 'read write'
            type BOOLEAN
            count 1
        }
    }
...
    control.35 {
        iface MIXER
        name 'Right Headphone Mixer Right DAC Switch'
        value false
        comment {
            access 'read write'
            type BOOLEAN
            count 1
        }
    }
...
to this (value false -> value true):
...
    control.33 {
        iface MIXER
        name 'Left Headphone Mixer Left DAC Switch'
        value true
        comment {
            access 'read write'
            type BOOLEAN
            count 1
        }
    }
...
    control.35 {
        iface MIXER
        name 'Right Headphone Mixer Right DAC Switch'
        value true
        comment {
            access 'read write'
            type BOOLEAN
            count 1
        }
    }
...
After saving the file:
# echo 'alsactl -f /storage/.config/asound.state restore' >/storage/.config/autostart.sh
# reboot --reboot now
	
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	Would it be possible to somehow make it not be muted after installation? 
With kind regards
Petr Chlupaty