Added example for multiple instanciation.

res/Examples/MIDI_DualMerger/MIDI_DualMerger.ino

@@ -0,0 +1,45 @@
+#include <SoftwareSerial.h>
+#include <MIDI.h>
+
+// This example shows how to create two instances of the library to create a merger.
+// There are two MIDI couples of IO, A and B, each using thru and merging with the
+// input from the other node. The result is the following:
+// A out = A in + B in
+// B out = B in + A in
+
+SoftwareSerial softSerial(2,3);
+
+MIDI_CREATE_INSTANCE(HardwareSerial, Serial,     midiA); 
+MIDI_CREATE_INSTANCE(SoftwareSerial, softSerial, midiB);
+
+void setup()
+{
+  // Initiate MIDI communications, listen to all channels
+  midiA.begin(MIDI_CHANNEL_OMNI);
+  midiB.begin(MIDI_CHANNEL_OMNI);
+}
+
+void loop()
+{
+    if (midiA.read())
+    {
+        // Thru on A has already pushed the input message to out A.
+        // Forward the message to out B as well.
+        midiB.send(midiA.getType(),
+                   midiA.getData1(),
+                   midiA.getData2(),
+                   midiA.getChannel());
+    }
+    
+    if (midiB.read())
+    {
+        // Thru on B has already pushed the input message to out B.
+        // Forward the message to out A as well.
+        midiA.send(midiB.getType(),
+                   midiB.getData1(),
+                   midiB.getData2(),
+                   midiB.getChannel());
+    }
+}
+
+