diff --git a/fm_rx.grc b/fm_rx.grc
index 37c828f..c3e60b0 100644
--- a/fm_rx.grc
+++ b/fm_rx.grc
@@ -433,6 +433,65 @@
       <value>f_ctr + offset_Hz + f_fine</value>
     </param>
   </block>
+  <block>
+    <key>variable_slider</key>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>converver</key>
+      <value>int_converter</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>2</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(40, 620)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>grid_pos</key>
+      <value></value>
+    </param>
+    <param>
+      <key>id</key>
+      <value>mix_leftRight</value>
+    </param>
+    <param>
+      <key>label</key>
+      <value></value>
+    </param>
+    <param>
+      <key>max</key>
+      <value>5</value>
+    </param>
+    <param>
+      <key>min</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>notebook</key>
+      <value></value>
+    </param>
+    <param>
+      <key>num_steps</key>
+      <value>10</value>
+    </param>
+    <param>
+      <key>style</key>
+      <value>wx.SL_HORIZONTAL</value>
+    </param>
+  </block>
   <block>
     <key>variable</key>
     <param>
@@ -2176,7 +2235,7 @@
     </param>
     <param>
       <key>gain</key>
-      <value>2</value>
+      <value>mix_leftRight</value>
     </param>
     <param>
       <key>id</key>