diff --git a/src/analysis/FFT.js b/src/analysis/FFT.js
index 1a0abdc..e1e9af0 100644
--- a/src/analysis/FFT.js
+++ b/src/analysis/FFT.js
@@ -85,6 +85,48 @@ class FFT extends p5soundNode {
      * @method analyze
      * @for FFT
      * @returns {Array} Array of amplitude values from 0 to 1.
+     * @example
+     * <div>
+     * <code>
+     * let soundfile, fft; 
+     * 
+     * async function setup() {
+     *  createCanvas(100, 100);
+     *  soundfile = await loadSound('assets/chime.mp3');
+     *  textAlign(CENTER);
+     *  textSize(10);
+     * 
+     *  fft = new p5.FFT();
+     *  soundfile.connect(fft);
+     *  soundfile.loop();
+     * }
+     * 
+     * function mousePressed() {
+     *  if(!soundfile.isPlaying()) {
+     *    soundfile.play();
+     *  }
+     *  else {
+     *    soundfile.stop();
+     *  }
+     * }
+     * 
+     * function draw() {
+     *  background(220);
+     *  
+     *  text('tap to play', width/2, height/2 - 20);
+     *  let spectrum = fft.analyze();
+     *  
+     *  noStroke();
+     *  fill(0);
+     * 
+     *  for (let i = 0; i < spectrum.length; i++) {
+     *    let x = map(i, 0, spectrum.length, 0, width);     
+     *    let h = -height + map(spectrum[i], 0, 0.1, height, 0);
+     *    rect(x, height, width / spectrum.length, h * 4)
+     *  }
+     * }
+     * </code>
+     * </div>
      */
     analyze() {
         return this.analyzer.getValue();
@@ -95,6 +137,47 @@ class FFT extends p5soundNode {
      * @method waveform
      * @for FFT
      * @return {Array} Array of sample values from -1 to -1.
+     * @example
+     * <div>
+     * <code>
+     * let soundfile, fft; 
+     * async function setup() {
+     *  createCanvas(100, 100);
+     *  soundfile = await loadSound('assets/chime.mp3');
+     *  textAlign(CENTER);
+     *  textSize(10);
+     * 
+     *  fft = new p5.FFT();
+     *  soundfile.connect(fft);
+     *  soundfile.loop();
+     * }
+     * 
+     * function mousePressed() {
+     *  if(!soundfile.isPlaying()) {
+     *    soundfile.play();
+     *  }
+     *  else {
+     *    soundfile.stop();
+     *  }
+     * }
+     * 
+     * function draw() {
+     *  background(220);
+     *   
+     *  text('tap to play', width/2, height/2 - 20);
+     *  let waveform = fft.waveform();
+     *  noFill();
+     *  beginShape();
+     *  stroke(20);
+     *  for (let i = 0; i < waveform.length; i++){
+     *    let x = map(i, 0, waveform.length, 0, width);
+     *    let y = map( waveform[i], -1, 1, 0, height);
+     *    vertex(x,y);
+     *  }
+     *  endShape();
+     * }
+     * </code>
+     * </div>
      */
     waveform() {
         return this.samples.getValue();
diff --git a/src/effects/Delay.js b/src/effects/Delay.js
index a6a37d9..a1097f8 100644
--- a/src/effects/Delay.js
+++ b/src/effects/Delay.js
@@ -187,6 +187,47 @@ class Delay extends p5soundMixEffect {
    * @param {Object} unit A p5.sound source such as an Oscillator, Soundfile, or AudioIn object.
    * @param {Number} [delayTime] The amount of delay in seconds. A number between 0 and 1. Keeps the current delay time if omitted.
    * @param {Number} [feedback] The amount of feedback. A number between 0 and 1. Keeps the current feedback amount if omitted.
+   * @example
+   * <div>
+   * <code>
+   * let delay, osc;
+   * 
+   * function setup() {
+   *  createCanvas(100, 100);
+   *  textAlign(CENTER);
+   *  text('tap to play', width/2, height/2);
+   *    
+   *  osc = new p5.Oscillator('sine');
+   *  osc.disconnect();
+   *  delay = new p5.Delay();
+   *  //use the delay effect to process the oscillator with a delay time of 0.240 seconds and a feedback amount of 0.7
+   *  delay.process(osc, 0.240, 0.7);
+   * }
+   *     
+   * function mousePressed() {
+   *  osc.start();
+   * }
+   *    
+   * function mouseReleased() {
+   *  osc.stop();
+   * }
+   * 
+   * function draw() {
+   *  background(220)
+   *  let dtime = map(mouseX, 0, width, 0.1, 0.5);
+   *  delay.delayTime(dtime);
+   *  let feedback = map(mouseY, 0, height, 0.1, 0.99);
+   *  delay.feedback(feedback);
+   *  if(!osc.started) {
+   *   text('tap to play', width/2, height/2);
+   *  }
+   *  else {
+   *   text('delay time: ' + dtime.toFixed(2), width/2, height/2);
+   *   text('feedback: ' + feedback.toFixed(2), width/2, height/2 + 20);
+   *  } 
+   * }
+   * </div>
+   * </code>
    */
   process(input, delayTime = this.node.delayTime.value, feedback = this.node.feedback.value) {
     //both values are set immediately rather than ramped: process() is usually
diff --git a/src/effects/PitchShifter.js b/src/effects/PitchShifter.js
index 389ed1e..c43455d 100644
--- a/src/effects/PitchShifter.js
+++ b/src/effects/PitchShifter.js
@@ -15,7 +15,7 @@ import { p5soundNode, resolveInput } from "../core/p5soundNode.js";
  * @example
  * <div>
  * <code>
- * let cnv, pitchShifter;
+ * let pitchShifter;
  *  
  * async function setup() {
  *   describe('a sketch that pitches the microphone input up an octave');
@@ -53,7 +53,7 @@ class PitchShifter extends p5soundNode {
      * @example
      * <div>
      * <code>
-     * let cnv, pitchShifter;
+     * let pitchShifter;
      *
      * async function setup() {
      *   describe('a sketch that pitches the microphone input up an octave');