diff --git a/Models/Instruments/speedometer.png b/Models/Instruments/speedometer.png
index 8403fbe..4e6c9eb 100644
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diff --git a/Models/Instruments/speedometer.pxd/QuickLook/Icon.tiff b/Models/Instruments/speedometer.pxd/QuickLook/Icon.tiff
new file mode 100644
index 0000000..a924df2
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diff --git a/Models/Instruments/speedometer.pxd/data/CFA65007-1101-44E4-8734-B93407B8BBF3 b/Models/Instruments/speedometer.pxd/data/CFA65007-1101-44E4-8734-B93407B8BBF3
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diff --git a/Models/Instruments/speedometer.pxd/metadata.info b/Models/Instruments/speedometer.pxd/metadata.info
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index 0000000..78d576c
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diff --git a/Models/Instruments/speedometer的副本.png b/Models/Instruments/speedometer的副本.png
deleted file mode 100644
index da106cf..0000000
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diff --git a/followme-sound.xml b/followme-sound.xml
index fbab6fe..7c779d1 100644
--- a/followme-sound.xml
+++ b/followme-sound.xml
@@ -16,7 +16,7 @@
     <max>0.0</max>
    </volume>
    <pitch>
-    <property>/velocities/airspeed-kt</property>
+    <property>/controls/engines/engine/rpma</property>
     <factor>0.005</factor>
     <offset>1.5</offset>
    </pitch>