MusicXML 4.1 Draft
MusicXML 4.1 Draft > MusicXML Reference > Examples > <string-mute> (On)

<string-mute> (On)

string-mute-element-on

<direction placement="above">
   <direction-type>
      <string-mute type="on" default-y="15"/>
   </direction-type>
   <sound>
      <play>
         <mute>on</mute>
      </play>
   </sound>
</direction>