add isStartRequired, add GroupChannel to synth

1 files changed, 11 insertions, 3 deletions

diff --git a/src/com/jsyn/unitgen/ChannelOut.java b/src/com/jsyn/unitgen/ChannelOut.java
index 5eafacc..89f778b 100644
--- a/src/com/jsyn/unitgen/ChannelOut.java
+++ b/src/com/jsyn/unitgen/ChannelOut.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.
@@ -20,7 +20,7 @@ import com.jsyn.ports.UnitInputPort;
 
 /**
  * Provides access to one channel of the audio output.
- * 
+ *
  * @author Phil Burk (C) 2009 Mobileer Inc
  * @see ChannelIn
  */
@@ -40,6 +40,14 @@ public class ChannelOut extends UnitGenerator {
         this.channelIndex = channelIndex;
     }
 
+    /**
+     * This unit won't do anything unless you start() it.
+     */
+    @Override
+    public boolean isStartRequired() {
+        return true;
+    }
+
     @Override
     public void generate(int start, int limit) {
         double[] inputs = input.getValues(0);