diff --git a/examples/SpectralDenoise/SpectralDenoise.ino b/examples/SpectralDenoise/SpectralDenoise.ino
new file mode 100644
index 0000000..0581b51
--- /dev/null
+++ b/examples/SpectralDenoise/SpectralDenoise.ino
@@ -0,0 +1,124 @@
+/* Spectral Noise reduction test program.
+ *  
+ *  The example takes sound in from both the I2S and USB of the Teensy/audio-daughtercard,
+ *  processes it, and sends it back out the I2S/headphone ports.
+ *  Every 10 seconds it switches from Spectral processing to data-passthrough and back,
+ *  to aid comparison.
+ *  Some information is printed on the serial monitor.
+ *  
+ *  This example requires the Teensy Board 'USB Type' in the Arduino Tools menu to be set
+ *  to a type that includes 'Audio', and ideally 'Serial' as well. Tested with
+ *  'Serial+MIDI+Audio'.
+ *  If you do not set 'Audio', you will get a compliation errors similar to:
+ *      "... OpenAudio_ArduinoLibrary/USB_Audio_F32.h: In member function 'virtual void AudioOutputUSB_F32::update()':"
+ *      "... OpenAudio_ArduinoLibrary/USB_Audio_F32.h:139:3: error: 'usb_out' was not declared in this scope"
+ *
+ * MIT License.  use at your own risk.
+ */
+
+#include "OpenAudio_ArduinoLibrary.h"
+#include "AudioStream_F32.h"
+#include "USB_Audio_F32.h"
+#include <Audio.h>
+#include <Wire.h>
+#include <SPI.h>
+#include <SD.h>
+#include <SerialFlash.h>
+
+// GUItool: begin automatically generated code
+AudioInputI2S_F32        audioInI2S1;    //xy=117,343
+AudioInputUSB_F32        audioInUSB1;    //xy=146,397
+AudioMixer4_F32          input_mixer;       //xy=370,321
+AudioSpectralDenoise_F32    Spectral;        //xy=852,250
+AudioMixer4_F32          output_mixer; //xy=993,296
+AudioSwitch4_OA_F32      processing_switch;
+AudioOutputI2S_F32       audioOutI2S1;   //xy=1257,367
+AudioOutputUSB_F32       audioOutUSB1;   //xy=1261,418
+
+//Inputs - mixed into one stream
+AudioConnection_F32      patchCord1(audioInI2S1, 0, input_mixer, 0);
+AudioConnection_F32      patchCord2(audioInUSB1, 0, input_mixer, 1);
+
+//route through a switch, so we can switch Spectral in/out
+AudioConnection_F32      patchCord3(input_mixer, 0, processing_switch, 0);
+
+//First route is direct - direct to the output mixer
+AudioConnection_F32      patchCord4(processing_switch, 0, output_mixer, 0);
+
+//Second route is through Spectral to the output mixer
+AudioConnection_F32      patchCord5(processing_switch, 1, Spectral, 0);
+AudioConnection_F32      patchCord6(Spectral, 0, output_mixer, 1);
+
+//And finally output the mixer to the output channels
+AudioConnection_F32      patchCord7(output_mixer, 0, audioOutI2S1, 0);
+AudioConnection_F32      patchCord8(output_mixer, 0, audioOutI2S1, 1);
+AudioConnection_F32      patchCord9(output_mixer, 0, audioOutUSB1, 0);
+AudioConnection_F32      patchCord10(output_mixer, 0, audioOutUSB1, 1);
+
+AudioControlSGTL5000     sgtl5000_1;     //xy=519,146
+// GUItool: end automatically generated code
+
+AudioSettings_F32 audio_settings(AUDIO_SAMPLE_RATE_EXACT, AUDIO_BLOCK_SAMPLES);
+
+int current_cycle = 0;  //Choose how we route the audio - to process or not
+
+static void spectralSetup(void){
+  //Use a 1024 FFT in this example
+  if (Spectral.setup(audio_settings, 1024) < 0 ) {
+    Serial.println("Failed to setup Spectral");
+  } else {
+    Serial.println("Spectral setup OK");    
+  }
+  Serial.flush();
+}
+
+//The setup function is called once when the system starts up
+void setup(void) {
+  //Start the USB serial link (to aid debugging)
+  Serial.begin(115200); delay(500);
+  Serial.println("Setup starting...");
+  
+  //Allocate dynamically shuffled memory for the audio subsystem
+  AudioMemory(30);  AudioMemory_F32(30);
+
+  Serial.println("Calling Spectral setup");
+  spectralSetup();
+  Serial.println("Spectral Setup done");
+  sgtl5000_1.enable();
+  sgtl5000_1.unmuteHeadphone();
+  sgtl5000_1.volume(0.5);
+
+  //End of setup
+  Serial.println("Setup complete.");
+};
+
+
+//After setup(), the loop function loops forever.
+//Note that the audio modules are called in the background.
+//They do not need to be serviced by the loop() function.
+void loop(void) {
+  // every 'n' seconds move to the next cycle of processing.
+  if ( ((millis()/1000) % 10) == 0 ) {
+    current_cycle++;
+    if (current_cycle >= 2) current_cycle = 0;
+
+    switch( current_cycle ) {
+      case 0:
+        Serial.println("Passthrough");
+        processing_switch.setChannel(0);
+        break;
+
+      case 1:
+        Serial.println("Run Spectral NR");
+        processing_switch.setChannel(1);
+        break;
+
+      default:
+        current_cycle = 0;  //oops - reset to start
+        break;
+    }
+  }
+  
+  //Nap - we don't need to hard-spin...
+  delay(1000);
+};