diff --git a/scripts/core/sxmo_audioout.sh b/scripts/core/sxmo_audioout.sh
index 9311ab7..310f307 100755
--- a/scripts/core/sxmo_audioout.sh
+++ b/scripts/core/sxmo_audioout.sh
@@ -5,9 +5,9 @@ ARG="$1"
 # shellcheck source=scripts/core/sxmo_common.sh
 . "$(dirname "$0")/sxmo_common.sh"
 
-SPEAKER="Line Out"
-HEADPHONE="Headphone"
-EARPIECE="Earpiece"
+${SPEAKER:-"Line Out"}
+${HEADPHONE:-"Headphone"}
+${EARPIECE:-"Earpiece"}
 
 amixer set "$SPEAKER" mute
 amixer set "$HEADPHONE" mute