diff --git a/src/main/java/sh/ball/audio/AudioPlayer.java b/src/main/java/sh/ball/audio/AudioPlayer.java
index a89dacaa..7e38932f 100644
--- a/src/main/java/sh/ball/audio/AudioPlayer.java
+++ b/src/main/java/sh/ball/audio/AudioPlayer.java
@@ -20,7 +20,7 @@ public interface AudioPlayer<S> extends Runnable, MidiListener {
 
   void setBackingMidiVolume(double scale);
 
-  void setDecay(double decaySeconds);
+  void setRelease(double decaySeconds);
 
   void setAttack(double attackSeconds);
 
diff --git a/src/main/java/sh/ball/audio/ShapeAudioPlayer.java b/src/main/java/sh/ball/audio/ShapeAudioPlayer.java
index 1cbd9a75..133a17d4 100644
--- a/src/main/java/sh/ball/audio/ShapeAudioPlayer.java
+++ b/src/main/java/sh/ball/audio/ShapeAudioPlayer.java
@@ -5,7 +5,6 @@ import sh.ball.audio.effect.*;
 import java.io.*;
 import java.util.*;
 import java.util.concurrent.*;
-import java.util.concurrent.atomic.AtomicInteger;
 import java.util.logging.Level;
 
 import sh.ball.audio.engine.AudioDevice;
@@ -45,13 +44,12 @@ public class ShapeAudioPlayer implements AudioPlayer<List<Shape>> {
   private int mainChannel = 0;
   private MidiNote baseNote = new MidiNote(60, mainChannel);
   private final double[] pitchBends = new double[MidiNote.NUM_CHANNELS];
-  private int lastDecay = 0;
-  private double decaySeconds = 0.2;
-  private int decayFrames;
+  private int lastRelease = 0;
+  private double releaseSeconds = 0.2;
+  private int releaseFrames;
   private int lastAttack = 0;
   private double attackSeconds = 0.1;
   private int attackFrames;
-  private int totalVolume = MidiNote.MAX_VELOCITY;
 
   private final Callable<AudioEngine> audioEngineBuilder;
   private final BlockingQueue<List<Shape>> frameQueue = new ArrayBlockingQueue<>(BUFFER_SIZE);
@@ -269,16 +267,16 @@ public class ShapeAudioPlayer implements AudioPlayer<List<Shape>> {
       try {
         keyOnLock.acquire();
 
-        totalVolume = MidiNote.MAX_VELOCITY;
+        int totalVolume = MidiNote.MAX_VELOCITY;
 
-        boolean resetDecay = false;
+        boolean resetRelease = false;
         boolean resetAttack = false;
 
         for (int i = keyOn.nextSetBit(0); i >= 0; i = keyOn.nextSetBit(i + 1)) {
           int noteVolume = keyActualVolumes[i];
 
-          if (lastDecay > decayFrames) {
-            resetDecay = true;
+          if (lastRelease > releaseFrames) {
+            resetRelease = true;
             if (noteVolume > keyTargetVolumes[i]) {
               int newVolume = --keyActualVolumes[i];
               if (newVolume <= 0) {
@@ -316,8 +314,8 @@ public class ShapeAudioPlayer implements AudioPlayer<List<Shape>> {
           }
         }
 
-        if (resetDecay) {
-          lastDecay = 0;
+        if (resetRelease) {
+          lastRelease = 0;
         }
 
         if (resetAttack) {
@@ -330,7 +328,7 @@ public class ShapeAudioPlayer implements AudioPlayer<List<Shape>> {
         keyOnLock.release();
       }
 
-      lastDecay++;
+      lastRelease++;
       lastAttack++;
 
       vector = new Vector2(
@@ -359,9 +357,9 @@ public class ShapeAudioPlayer implements AudioPlayer<List<Shape>> {
   }
 
   @Override
-  public void setDecay(double decaySeconds) {
-    this.decaySeconds = decaySeconds;
-    updateDecay();
+  public void setRelease(double releaseSeconds) {
+    this.releaseSeconds = releaseSeconds;
+    updateRelease();
   }
 
   @Override
@@ -528,12 +526,12 @@ public class ShapeAudioPlayer implements AudioPlayer<List<Shape>> {
         phase.setSampleRate(sampleRate);
       }
     }
-    updateDecay();
+    updateRelease();
     updateAttack();
   }
 
-  private void updateDecay() {
-    this.decayFrames = (int) (decaySeconds * sampleRate / MidiNote.MAX_VELOCITY);
+  private void updateRelease() {
+    this.releaseFrames = (int) (releaseSeconds * sampleRate / MidiNote.MAX_VELOCITY);
   }
 
   private void updateAttack() {
diff --git a/src/main/java/sh/ball/gui/controller/MainController.java b/src/main/java/sh/ball/gui/controller/MainController.java
index 97a3796d..0335a43c 100644
--- a/src/main/java/sh/ball/gui/controller/MainController.java
+++ b/src/main/java/sh/ball/gui/controller/MainController.java
@@ -30,7 +30,6 @@ import java.util.concurrent.*;
 import java.util.function.Consumer;
 import java.util.function.UnaryOperator;
 import java.util.logging.Level;
-import java.util.stream.Collectors;
 
 import javafx.fxml.FXML;
 import javafx.fxml.Initializable;
@@ -179,7 +178,7 @@ public class MainController implements Initializable, FrequencyListener, MidiLis
   @FXML
   private Spinner<Double> attackSpinner;
   @FXML
-  private Spinner<Double> decaySpinner;
+  private Spinner<Double> releaseSpinner;
   @FXML
   private ComboBox<PrintableSlider> sliderComboBox;
   @FXML
@@ -491,8 +490,8 @@ public class MainController implements Initializable, FrequencyListener, MidiLis
     attackSpinner.setValueFactory(new SpinnerValueFactory.DoubleSpinnerValueFactory(0, 10, 0.2, 0.01));
     attackSpinner.valueProperty().addListener((o, oldValue, newValue) -> audioPlayer.setAttack(newValue));
 
-    decaySpinner.setValueFactory(new SpinnerValueFactory.DoubleSpinnerValueFactory(0, 10, 0.1, 0.01));
-    decaySpinner.valueProperty().addListener((o, oldValue, newValue) -> audioPlayer.setDecay(newValue));
+    releaseSpinner.setValueFactory(new SpinnerValueFactory.DoubleSpinnerValueFactory(0, 10, 0.1, 0.01));
+    releaseSpinner.valueProperty().addListener((o, oldValue, newValue) -> audioPlayer.setRelease(newValue));
 
     recordLengthSpinner.setValueFactory(new SpinnerValueFactory.DoubleSpinnerValueFactory(0.1, 100000000, 2.0, 0.1));
 
@@ -1185,7 +1184,7 @@ public class MainController implements Initializable, FrequencyListener, MidiLis
       root.appendChild(midiAttack);
 
       Element midiDecay = document.createElement("midiDecay");
-      midiDecay.appendChild(document.createTextNode(decaySpinner.getValue().toString()));
+      midiDecay.appendChild(document.createTextNode(releaseSpinner.getValue().toString()));
       root.appendChild(midiDecay);
 
       Element audioSample = document.createElement("audioSample");
@@ -1370,9 +1369,9 @@ public class MainController implements Initializable, FrequencyListener, MidiLis
         attackSpinner.getValueFactory().setValue(Double.parseDouble(midiAttack.getTextContent()));
       }
 
-      Element midiDecay = (Element) root.getElementsByTagName("midiDecay").item(0);
-      if (midiDecay != null) {
-        decaySpinner.getValueFactory().setValue(Double.parseDouble(midiDecay.getTextContent()));
+      Element midiRelease = (Element) root.getElementsByTagName("midiDecay").item(0);
+      if (midiRelease != null) {
+        releaseSpinner.getValueFactory().setValue(Double.parseDouble(midiRelease.getTextContent()));
       }
 
       Element audioSample = (Element) root.getElementsByTagName("audioSample").item(0);
diff --git a/src/main/resources/fxml/main.fxml b/src/main/resources/fxml/main.fxml
index c38dd101..669bad33 100644
--- a/src/main/resources/fxml/main.fxml
+++ b/src/main/resources/fxml/main.fxml
@@ -139,12 +139,12 @@
                      </AnchorPane>
                   </content>
                </CustomMenuItem>
-               <CustomMenuItem hideOnClick="false" mnemonicParsing="false" text="Note Decay (sec)">
+               <CustomMenuItem hideOnClick="false" mnemonicParsing="false" text="Note Release (sec)">
                   <content>
                      <AnchorPane>
                         <children>
-                           <Label prefHeight="25.0" text="Note Decay (sec)" textFill="WHITE" />
-                           <Spinner fx:id="decaySpinner" editable="true" layoutY="25.0" />
+                           <Label prefHeight="25.0" text="Note Release (sec)" textFill="WHITE" />
+                           <Spinner fx:id="releaseSpinner" editable="true" layoutY="25.0" />
                         </children>
                      </AnchorPane>
                   </content>