Headphones master button working!

Pioneer DDJ-200.midi.xml

@@ -354,6 +354,16 @@
                     <fourteen-bit-msb/>
                 </options>
             </control>
+            <control>
+                <group>[Master]</group>
+                <key>DDJ200.headmix</key>
+                <description>Headphones master button as headMix knob</description>
+                <status>0x96</status>
+                <midino>0x63</midino>
+                <options>
+                    <script-binding/>
+                </options>
+            </control>
             <control>
                 <group>[Channel2]</group>
                 <key>pfl</key>
@@ -862,7 +872,7 @@
             <output>
                 <group>[Channel1]</group>
                 <key>sync_enabled</key>
-                <description>Deck 2: Beat sync LED</description>
+                <description>Deck 1: Beat sync LED</description>
                 <status>0x90</status>
                 <midino>0x58</midino>
                 <on>0x7F</on>

Pioneer-DDJ-200-scripts.js

@@ -1,22 +1,24 @@
-var DDJ200 = {};
+var DDJ200 = {
+ headMix_switch : 0
+};
 
-DDJ200.init = function () {}
+DDJ200.init = function () {};
 
-DDJ200.shutdown = function () {}
+DDJ200.shutdown = function () {};
 
 DDJ200.scratch = function (channel, control, value, status, group) {
     // For a control that centers on 0x40 (64):
     // Convert value down to +1/-1
     // Register the movement
     engine.scratchTick(script.deckFromGroup(group), value - 64);
-}
+};
 
 DDJ200.jog = function (channel, control, value, status, group) {
     // For a control that centers on 0x40 (64):
     // Convert value down to +1/-1
     // Register the movement
     engine.setValue(group, 'jog', value - 64);
-}
+};
 
 DDJ200.touch = function (channel, control, value, status, group) {
     var deckNumber = script.deckFromGroup(group);
@@ -28,7 +30,7 @@ DDJ200.touch = function (channel, control, value, status, group) {
         var alpha = 1.0 / 8;
         engine.scratchEnable(deckNumber, 128, 33 + 1 / 3, alpha, alpha / 32);
     }
-}
+};
 
 DDJ200.seek = function (channel, control, value, status, group) {
     var oldPos = engine.getValue(group, "playposition");
@@ -38,4 +40,14 @@ DDJ200.seek = function (channel, control, value, status, group) {
     var duration = engine.getValue(group, "duration");
     var newPos = Math.max(0, oldPos + ((value - 64) * 0.2 / duration));
     engine.setValue(group, "playposition", newPos); // Strip search
-}
+};
+
+DDJ200.headmix = function (channel, control, value, status, group) {
+    if (value == 0) { return; }
+    DDJ200.headMix_switch = 1 - DDJ200.headMix_switch;
+    // toggle headMix knob to values of -1 and 1
+    engine.setValue("[Master]", "headMix", 2 * DDJ200.headMix_switch - 1);
+
+    // now switch headMix LED with midi.sendShortMsg(0x96, 0x63, 0x7F or 0);
+    midi.sendShortMsg(0x90+channel, control, 0x7F * DDJ200.headMix_switch);
+};