Update WavFilePlayer example

examples/WavFilePlayer/WavFilePlayer.ino

-#include <Audio.h>
-#include <Wire.h>
-#include <SD.h>
-#include <SPI.h>
-
-// Create the Audio components.  These should be created in the
-// order data flows, inputs/sources -> processing -> outputs
+// Simple WAV file player example
 //
-AudioPlaySdWav     wav;
-AudioOutputI2S     dac;
-
-// Create Audio connections between the components
+// Requires the audio shield:
+//   http://www.pjrc.com/store/teensy3_audio.html
+//
+// Data files to put on your SD card can be downloaded here:
+//   http://www.pjrc.com/teensy/td_libs_AudioDataFiles.html
 //
-AudioConnection c1(wav, 0, dac, 0);
-AudioConnection c2(wav, 1, dac, 1);
+// This example code is in the public domain.
 
-// Create an object to control the audio shield.
-// 
-AudioControlSGTL5000 audioShield;
+#include <Audio.h>
+#include <Wire.h>
+#include <SPI.h>
+#include <SD.h>
 
+// GUItool: begin automatically generated code
+AudioPlaySdWav           playWav1;       //xy=154,78
+AudioOutputI2S           i2s1;           //xy=334,89
+AudioConnection          patchCord1(playWav1, 0, i2s1, 0);
+AudioConnection          patchCord2(playWav1, 1, i2s1, 1);
+AudioControlSGTL5000     sgtl5000_1;     //xy=240,153
+// GUItool: end automatically generated code
 
 void setup() {
+  Serial.begin(9600);
+
   // Audio connections require memory to work.  For more
   // detailed information, see the MemoryAndCpuUsage example
   AudioMemory(5);
 
-  audioShield.enable();
-  audioShield.volume(0.5);
+  sgtl5000_1.enable();
+  sgtl5000_1.volume(0.5);
 
   SPI.setMOSI(7);
   SPI.setSCK(14);
-  if (SD.begin(10)) {
-    wav.play("01_16M.WAV");
+  if (!(SD.begin(10))) {
+    // stop here, but print a message repetitively
+    while (1) {
+      Serial.println("Unable to access the SD card");
+      delay(500);
+    }
   }
 }
 
+void playFile(const char *filename)
+{
+  Serial.print("Playing file: ");
+  Serial.println(filename);
+
+  // Start playing the file.  This sketch continues to
+  // run while the file plays.
+  playWav1.play(filename);
+
+  // A brief delay for the library read WAV info
+  delay(5);
+
+  // Simply wait for the file to finish playing.
+  while (playWav1.isPlaying()) {
+    // uncomment these lines if you audio shield
+    // has the optional volume pot soldered
+    //float vol = analogRead(15);
+    //vol = vol / 1024;
+    // sgtl5000_1.volume(vol);
+  }
+}
+
+
 void loop() {
-  float vol = analogRead(15);
-  vol = vol / 1024;
-  audioShield.volume(vol);
-  delay(20);
+  playFile("SDTEST1.WAV");
+  delay(500);
+  playFile("SDTEST2.WAV");
+  delay(500);
+  playFile("SDTEST3.WAV");
+  delay(500);
+  playFile("SDTEST4.WAV");
+  delay(1500);
 }