1 files changed, 26 insertions, 22 deletions

diff --git a/src/com/jsyn/ports/InputMixingBlockPart.java b/src/com/jsyn/ports/InputMixingBlockPart.java
index 3211342..5b54b99 100644
--- a/src/com/jsyn/ports/InputMixingBlockPart.java
+++ b/src/com/jsyn/ports/InputMixingBlockPart.java
@@ -4,9 +4,9 @@
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * 
+ *
  *     http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -23,16 +23,18 @@ import com.jsyn.unitgen.UnitGenerator;
 
 /**
  * A UnitInputPort has an array of these, one for each part.
- * 
+ *
  * @author Phil Burk 2009 Mobileer Inc
  */
 
 public class InputMixingBlockPart extends PortBlockPart {
     private double[] mixer = new double[Synthesizer.FRAMES_PER_BLOCK];
     private double current;
+    private UnitInputPort unitInputPort;
 
-    InputMixingBlockPart(UnitBlockPort unitBlockPort, double defaultValue) {
-        super(unitBlockPort, defaultValue);
+    InputMixingBlockPart(UnitInputPort unitInputPort, double defaultValue) {
+        super(unitInputPort, defaultValue);
+        this.unitInputPort = unitInputPort;
     }
 
     @Override
@@ -52,30 +54,32 @@ public class InputMixingBlockPart extends PortBlockPart {
         int numConnections = getConnectionCount();
         // System.out.println("numConnection = " + numConnections + " for " +
         // this );
-        if (numConnections == 0)
-        // No connection so just use our own data.
-        {
+        if (numConnections == 0) {
+            // No connection so just use our own data.
             result = super.getValues();
-        } else if (numConnections == 1)
-        // Grab values from one connected port.
-        {
-            PortBlockPart otherPart = getConnection(0);
-            result = otherPart.getValues();
-        } else
-        // Mix all of the inputs.
-        {
-            PortBlockPart otherPart = getConnection(0);
-            double[] inputs = otherPart.getValues();
+        } else {
+            // Mix all of the connected ports.
+            double[] inputs;
+            int jCon = 0;
+            PortBlockPart otherPart;
+            // Choose value to initialize the mixer array.
+            if (unitInputPort.isValueAdded()) {
+                inputs = super.getValues();  // prime mixer with the set() values
+                jCon = 0;
+            } else {
+                otherPart = getConnection(jCon);
+                inputs = otherPart.getValues(); // prime mixer with first connected
+                jCon = 1;
+            }
             for (int i = 0; i < mixer.length; i++) {
-                mixer[i] = inputs[i]; // set directly instead of zeroing first
+                mixer[i] = inputs[i];
             }
             // Now mix in the remaining inputs.
-            for (int jCon = 1; jCon < numConnections; jCon++) {
+            for (; jCon < numConnections; jCon++) {
                 otherPart = getConnection(jCon);
-
                 inputs = otherPart.getValues();
                 for (int i = 0; i < mixer.length; i++) {
-                    mixer[i] += inputs[i]; // mix with previous inputs
+                    mixer[i] += inputs[i];
                 }
             }
             result = mixer;