diff --git a/audio/audio_hw.cpp b/audio/audio_hw.cpp
old mode 100644
new mode 100755
index b9c14e7..2135f14
--- a/audio/audio_hw.cpp
+++ b/audio/audio_hw.cpp
@@ -886,6 +886,22 @@ static int adev_set_parameters(struct audio_hw_device *dev,
             ALOGV("%s, line %d, adev->audioStreamIn == NULL", __FUNCTION__, __LINE__);
         }
     }
+
+    /* charmk, for test */
+    memset(str, 0x0, 32);
+    ret = ret = str_parms_get_str(parms, "nugu_amp", &str[0], 32);
+    {
+        if (!strcmp(str, "off"))
+        {
+            ALOGI("[charmk]===============> NUGU AMP OFF");
+            AMP_SND_SetMute(AMP_SND_PATH_71, true);
+        }
+        else if (!strcmp(str, "on"))
+        {
+            ALOGI("[charmk]===============> NUGU AMP ON");
+            AMP_SND_SetMute(AMP_SND_PATH_71, false);
+        }
+    }
 #endif
 
     ret = str_parms_get_int(parms, AUDIO_PARAMETER_DEVICE_DISCONNECT, &value);