--- src/modules/alsa/mixer/paths/analog-output.conf.common.orig
+++ src/modules/alsa/mixer/paths/analog-output.conf.common
@@ -110,6 +110,9 @@
 name = output-amplifier-off
 priority = 0
 
+[Element IEC958 Optical Raw]
+switch = off
+
 ;;; 'Analog Output'
 
 [Element Analog Output]