FM / nau8824

/usr/share/alsa/ucm2/codecs/nau8824

Name	Size	Mode	Actions
EnableSeq.conf	515	0644	edit dl rm
HeadPhones.conf	304	0644	edit dl rm
HeadsetMic.conf	544	0644	edit dl rm
InternalMic.conf	496	0644	edit dl rm
MonoSpeaker.conf	512	0644	edit dl rm
Speaker.conf	440	0644	edit dl rm

Edit: /usr/share/alsa/ucm2/codecs/nau8824/MonoSpeaker.conf (512B)

SectionDevice."Speaker" { Comment "Mono Speaker" Value { PlaybackPriority 100 PlaybackPCM "hw:${CardId}" } ConflictingDevice [ "Headphones" ] EnableSequence [ # nau8824 mono speaker boards have the speaker on the right chan cset "name='Speaker Left DACL Volume' 0" cset "name='Speaker Left DACR Volume' 0" cset "name='Speaker Right DACL Volume' 1" cset "name='Speaker Right DACR Volume' 1" cset "name='Ext Spk Switch' on" ] DisableSequence [ cset "name='Ext Spk Switch' off" ] }