diff --git a/mqtt_srv.py b/mqtt_srv.py
index 4d34c70..13165a3 100755
--- a/mqtt_srv.py
+++ b/mqtt_srv.py
@@ -683,7 +683,8 @@ def on_message(client, userdata, msg):
                 else:
                     myCmd =f'amixer set Master unmute'
                 try:
-                    output = subprocess.run(["amixer", "sset", "Master", "mute"], check=True)
+                    percent = 20
+                    output = subprocess.run(["pactl", "set-sink-volume", "@DEFAULT_SINK@", f"{percent}%"], check=True)
                     writeLog(output)
                 except  subprocess.CalledProcessError as e:
                     writeLog(e)