File: //proc/self/root/usr/share/alsa/ucm2/codecs/rt5640/MonoSpeaker.conf
SectionDevice."Speaker" {
	Comment "Mono Speaker"
	ConflictingDevice [
		"Headphones"
	]
	EnableSequence [
		cset "name='DAC MIXL INF1 Switch' on"
		cset "name='DAC MIXR INF1 Switch' on"
		cset "name='Stereo DAC MIXL DAC L1 Switch' on"
		cset "name='Stereo DAC MIXR DAC R1 Switch' on"
		cset "name='Stereo DAC MIXL DAC L2 Switch'  on"
		cset "name='Stereo DAC MIXR DAC R2 Switch'  on"
		cset "name='SPK MIXL DAC L1 Switch' on"
		cset "name='SPK MIXR DAC R1 Switch' on"
		cset "name='SPOL MIX SPKVOL L Switch' on"
# for mono speaker we apply left on right
#		cset "name='SPOR MIX SPKVOL R Switch' on"
		cset "name='SPOL MIX SPKVOL R Switch' on"
		cset "name='Speaker Switch' on"
		cset "name='Speaker Channel Switch' on"
		cset "name='Headphone Switch' off"
		cset "name='Speaker L Playback Switch' on"
		cset "name='Speaker R Playback Switch' on"
		cset "name='Speaker Playback Volume' 35"
	]
	DisableSequence [
		cset "name='Speaker Switch' off"
		cset "name='Speaker Channel Switch' off"
		cset "name='Speaker L Playback Switch' off"
		cset "name='Speaker R Playback Switch' off"
		cset "name='Speaker Playback Volume' 0"
	]
	Value {
		PlaybackPriority 100
		PlaybackPCM "hw:${CardId}"
	}
}