Add Delay example

examples/Effects/Delay/Delay.ino

+// Delay demonstration example, Teensy Audio Library
+//   http://www.pjrc.com/teensy/td_libs_Audio.html
+// 
+// Creates a chirp on the left channel, then
+// three delayed copies on the right channel.
+//
+// Requires the audio shield:
+//   http://www.pjrc.com/store/teensy3_audio.html
+//
+// This example code is in the public domain.
+
+#include <Audio.h>
+#include <Wire.h>
+#include <SPI.h>
+#include <SD.h>
+
+// GUItool: begin automatically generated code
+AudioSynthWaveformSine   sine1;          //xy=158,74
+AudioEffectEnvelope      envelope1;      //xy=232,156
+AudioEffectDelay         delay1;         //xy=393,238
+AudioMixer4              mixer1;         //xy=532,205
+AudioOutputI2S           i2s1;           //xy=611,61
+AudioConnection          patchCord1(sine1, envelope1);
+AudioConnection          patchCord2(envelope1, delay1);
+AudioConnection          patchCord3(envelope1, 0, i2s1, 0);
+AudioConnection          patchCord4(delay1, 0, mixer1, 0);
+AudioConnection          patchCord5(delay1, 1, mixer1, 1);
+AudioConnection          patchCord6(delay1, 2, mixer1, 2);
+AudioConnection          patchCord7(delay1, 3, mixer1, 3);
+AudioConnection          patchCord8(mixer1, 0, i2s1, 1);
+AudioControlSGTL5000     sgtl5000_1;     //xy=195,272
+// GUItool: end automatically generated code
+
+void setup() {
+  // allocate enough memory for the delay
+  AudioMemory(120);
+  
+  // enable the audio shield
+  sgtl5000_1.enable();
+  sgtl5000_1.volume(0.5);
+  
+  // configure a sine wave for the chirp
+  // the original is turned on/off by an envelope effect
+  // and output directly on the left channel
+  sine1.frequency(1000);
+  sine1.amplitude(0.5);
+
+  // create 3 delay taps, which connect through a
+  // mixer to the right channel output
+  delay1.delay(0, 110);
+  delay1.delay(1, 220);
+  delay1.delay(2, 330);
+}
+
+void loop() {
+  envelope1.noteOn();
+  delay(36);
+  envelope1.noteOff();
+  delay(4000);
+}

gui/list.html

 		silent.  If this channel is the longest delay, memory usage is
 		automatically reduced to accomodate only the remaining channels used.
 	</p>
-	<!--<h3>Examples</h3>
-	<p class=exam>File &gt; Examples &gt; Audio &gt; 
-	</p>-->
+	<h3>Examples</h3>
+	<p class=exam>File &gt; Examples &gt; Audio &gt; Effects &gt; Delay
+	</p>
 	<h3>Notes</h3>
 	<p>Memory for the delayed signal is take from the memory pool allocated by
 		<a href="http://www.pjrc.com/teensy/td_libs_AudioConnection.html" target="_blank">AudioMemory()</a>.