diff --git a/mqtt_srv.py b/mqtt_srv.py
index 5731d63..745d4bd 100755
--- a/mqtt_srv.py
+++ b/mqtt_srv.py
@@ -679,7 +679,7 @@ def on_message(client, userdata, msg):
                     myCmd =f'amixer set Master mute'
                 else:
                     myCmd =f'amixer set Master unmute'
-                status, output = subprocess.getstatusoutput(myCmd)
+                subprocess.run(["amixer", "sset", "Master", "mute"], check=True)
             writeLog(myCmd)
             output = subprocess.Popen(myCmd, shell=True)
             writeLog(output)