Hi I am not Hias but saw your post and thought I could help. I think the issue is a couple of missing quotation marks in the line bellow
+ amixer -q -Dhw:0 cset name=TX Playback Switch off
I looked through some of the Use Case Scripts and it seems the above line should be:
amixer -q -Dhw:0 cset name="TX Playback Switch" off
Try changing that and see if it works, otherwise you might just have to wait for Hias to reply
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