diff --git a/huawei-soundcard-headphones-monitor.sh b/huawei-soundcard-headphones-monitor.sh
index 282a7dc..7eef0df 100644
--- a/huawei-soundcard-headphones-monitor.sh
+++ b/huawei-soundcard-headphones-monitor.sh
@@ -20,7 +20,7 @@
 pidof -o %PPID -x $0 >/dev/null && echo "Script $0 already running" && exit 1
 
 function move_output() {
-    sudo hda-verb /dev/snd/hwC0D0 0x16 0x701 "$@" > /dev/null 2> /dev/null
+   hda-verb /dev/snd/hwC0D0 0x16 0x701 "$@" > /dev/null 2> /dev/null
 }
 
 function move_output_to_speaker() {
@@ -35,44 +35,57 @@ function switch_to_speaker() {
     move_output_to_speaker
 
     # enable speaker
-    sudo hda-verb /dev/snd/hwC0D0 0x17 0x70C 0x0002 > /dev/null 2> /dev/null
+    hda-verb /dev/snd/hwC0D0 0x17 0x70C 0x0002 > /dev/null 2> /dev/null
 
     # disable headphones
-    sudo hda-verb /dev/snd/hwC0D0 0x1 0x715 0x2 > /dev/null 2> /dev/null
+    hda-verb /dev/snd/hwC0D0 0x1 0x715 0x2 > /dev/null 2> /dev/null
 }
 
 function switch_to_headphones() {
     move_output_to_headphones
 
     # disable speaker
-    sudo hda-verb /dev/snd/hwC0D0 0x17 0x70C 0x0000 > /dev/null 2> /dev/null
+    hda-verb /dev/snd/hwC0D0 0x17 0x70C 0x0000 > /dev/null 2> /dev/null
 
     # pin output mode
-    sudo hda-verb /dev/snd/hwC0D0 0x1 0x717 0x2 > /dev/null 2> /dev/null
+    hda-verb /dev/snd/hwC0D0 0x1 0x717 0x2 > /dev/null 2> /dev/null
 
     # pin enable
-    sudo hda-verb /dev/snd/hwC0D0 0x1 0x716 0x2 > /dev/null 2> /dev/null
+    hda-verb /dev/snd/hwC0D0 0x1 0x716 0x2 > /dev/null 2> /dev/null
 
     # clear pin value
-    sudo hda-verb /dev/snd/hwC0D0 0x1 0x715 0x0 > /dev/null 2> /dev/null
+    hda-verb /dev/snd/hwC0D0 0x1 0x715 0x0 > /dev/null 2> /dev/null
 
     # sets amixer sink port to headphones instead of the speaker
     pacmd set-sink-port alsa_output.pci-0000_00_1f.3-platform-skl_hda_dsp_generic.HiFi__hw_sofhdadsp__sink "[Out] Headphones"
 }
 
+function get_sound_card_index() {
+    card_index=$(cat /proc/asound/cards | grep sof-hda-dsp | head -n1 | grep -Eo "^\s*[0-9]+")
+    # remove leading white spaces
+    card_index="${card_index#"${card_index%%[![:space:]]*}"}"
+    echo $card_index
+}
+
 sleep 2 # allows audio system to initialise first
 
+card_index=$(get_sound_card_index)
+if [ $card_index == "" ]; then
+    echo "sof-dha-dsp card is not found in /proc/asound/cards"
+    return 1
+fi
+
 old_status=0
 
 while true; do
     # if headphone jack isn't plugged:
-    if amixer get Headphone | grep -q "off"; then
+    if amixer "-c${card_index}" get Headphone | grep -q "off"; then 
         status=1
-	      move_output_to_speaker
+	    move_output_to_speaker
     # if headphone jack is plugged:
     else
         status=2
-	      move_output_to_headphones
+	    move_output_to_headphones
     fi
 
     if [ ${status} -ne ${old_status} ]; then