diff --git a/src/main/java/device/cdPlayer/CDPlayer.java b/src/main/java/device/cdPlayer/CDPlayer.java
index 1f5ea0e..f0b82a6 100644
--- a/src/main/java/device/cdPlayer/CDPlayer.java
+++ b/src/main/java/device/cdPlayer/CDPlayer.java
@@ -21,12 +21,20 @@ public class CDPlayer implements Device {
 
     @Override
     public void louder() {
-
+        if(volume < 100) {
+            volume += 1;
+        } else {
+            volume = 100;
+        }
     }
 
     @Override
     public void quieter() {
-
+        if(volume > 0) {
+            volume -= 1;
+        } else {
+            volume = 0;
+        }
     }
 
     @Override