--- /dev/null
+<?xml version="1.0"?>
+<!--
+###################################################
+##Mute Block:
+## Cast input to bool.
+###################################################
+ -->
+<block>
+ <name>Mute</name>
+ <key>gr_mute_xx</key>
+ <import>from gnuradio import gr</import>
+ <make>gr.mute_$(type.fcn)(bool($mute))</make>
+ <callback>set_mute(bool($mute))</callback>
+ <param>
+ <name>IO Type</name>
+ <key>type</key>
+ <type>enum</type>
+ <option>
+ <name>Complex</name>
+ <key>complex</key>
+ <opt>fcn:cc</opt>
+ </option>
+ <option>
+ <name>Float</name>
+ <key>float</key>
+ <opt>fcn:ff</opt>
+ </option>
+ <option>
+ <name>Int</name>
+ <key>int</key>
+ <opt>fcn:ii</opt>
+ </option>
+ <option>
+ <name>Short</name>
+ <key>short</key>
+ <opt>fcn:ss</opt>
+ </option>
+ </param>
+ <param>
+ <name>Mute</name>
+ <key>mute</key>
+ <value>False</value>
+ <type>raw</type>
+ <option>
+ <name>True</name>
+ <key>True</key>
+ </option>
+ <option>
+ <name>False</name>
+ <key>False</key>
+ </option>
+ </param>
+ <sink>
+ <name>in</name>
+ <type>$type</type>
+ </sink>
+ <source>
+ <name>out</name>
+ <type>$type</type>
+ </source>
+</block>