diff --git a/src/main/java/io/github/foundationgames/phonos/item/PianoRollItem.java b/src/main/java/io/github/foundationgames/phonos/item/PianoRollItem.java
index 277b24a..184fa8e 100644
--- a/src/main/java/io/github/foundationgames/phonos/item/PianoRollItem.java
+++ b/src/main/java/io/github/foundationgames/phonos/item/PianoRollItem.java
@@ -42,9 +42,11 @@ public static int getDuration(ItemStack stack) {
     @Override
     public void appendStacks(ItemGroup group, DefaultedList<ItemStack> stacks) {
         if (group == this.getGroup() || group == ItemGroup.SEARCH) {
-            var chopsticks = this.create(BuiltinPianoRolls.CHOPSTICKS);
-            chopsticks.setCustomName(new TranslatableText(getTranslationKey() + ".chopsticks").styled(style -> style.withItalic(false)));
-            stacks.add(chopsticks);
+            BuiltinPianoRolls.forEach((name, roll) -> {
+                var stack = this.create(roll);
+                stack.setCustomName(new TranslatableText(getTranslationKey() + "." + name).styled(style -> style.withItalic(false)));
+                stacks.add(stack);
+            });
         }
     }
 
diff --git a/src/main/java/io/github/foundationgames/phonos/util/piano/BuiltinPianoRolls.java b/src/main/java/io/github/foundationgames/phonos/util/piano/BuiltinPianoRolls.java
index 7ea5eab..44fbcde 100644
--- a/src/main/java/io/github/foundationgames/phonos/util/piano/BuiltinPianoRolls.java
+++ b/src/main/java/io/github/foundationgames/phonos/util/piano/BuiltinPianoRolls.java
@@ -2,36 +2,35 @@
 
 import io.github.foundationgames.phonos.util.PhonosUtil;
 
+import java.sql.Date;
+import java.time.Instant;
+import java.time.Month;
 import java.util.ArrayList;
+import java.util.Calendar;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
+import java.util.function.BiConsumer;
 
 public final class BuiltinPianoRolls {
+    private static final Map<String, PianoRoll> REGISTRY = new HashMap<>();
+
     private BuiltinPianoRolls() {}
 
-    public static final PianoRoll CHOPSTICKS;
+    public static final PianoRoll CHOPSTICKS = register("chopsticks", chopsticks());
+    private static final int CHOPSTICKS_SPEED = 5;
 
-    private static void chopsticksCommonSection(List<PianoRoll.Stage> stages) {
-        for (int i = 0; i < 6; i++) {
-            stages.add(new PianoRoll.Stage(new float[] {
-                    PhonosUtil.pitchFromNote(11), // F4
-                    PhonosUtil.pitchFromNote(13)  // G4
-            }, 5));
-        }
-        for (int i = 0; i < 6; i++) {
-            stages.add(new PianoRoll.Stage(new float[] {
-                    PhonosUtil.pitchFromNote(10), // E4
-                    PhonosUtil.pitchFromNote(13)  // G4
-            }, 5));
-        }
-        for (int i = 0; i < 6; i++) {
-            stages.add(new PianoRoll.Stage(new float[] {
-                    PhonosUtil.pitchFromNote(8),  // D4
-                    PhonosUtil.pitchFromNote(17)  // B5
-            }, 5));
-        }
+    public static PianoRoll register(String name, PianoRoll roll) {
+        REGISTRY.put(name, roll);
+
+        return roll;
     }
 
-    static {
+    public static void forEach(BiConsumer<String, PianoRoll> action) {
+        REGISTRY.forEach(action);
+    }
+
+    private static PianoRoll chopsticks() {
         var stages = new ArrayList<PianoRoll.Stage>();
 
         chopsticksCommonSection(stages);
@@ -40,33 +39,93 @@ private static void chopsticksCommonSection(List<PianoRoll.Stage> stages) {
             stages.add(new PianoRoll.Stage(new float[] {
                     PhonosUtil.pitchFromNote(6),  // C4
                     PhonosUtil.pitchFromNote(18)  // C5
-            }, 5));
+            }, CHOPSTICKS_SPEED));
         }
         stages.add(new PianoRoll.Stage(new float[] {
                 PhonosUtil.pitchFromNote(8),  // D4
                 PhonosUtil.pitchFromNote(17)  // B5
-        }, 5));
+        }, CHOPSTICKS_SPEED));
         stages.add(new PianoRoll.Stage(new float[] {
                 PhonosUtil.pitchFromNote(10), // E4
                 PhonosUtil.pitchFromNote(15)  // A4
-        }, 5));
+        }, CHOPSTICKS_SPEED));
 
         chopsticksCommonSection(stages);
 
         stages.add(new PianoRoll.Stage(new float[] {
                 PhonosUtil.pitchFromNote(6),  // C4
                 PhonosUtil.pitchFromNote(18)  // C5
-        }, 5));
+        }, CHOPSTICKS_SPEED));
         stages.add(new PianoRoll.Stage(new float[] {
                 PhonosUtil.pitchFromNote(13),  // G4
-        }, 5));
+        }, CHOPSTICKS_SPEED));
         stages.add(new PianoRoll.Stage(new float[] {
                 PhonosUtil.pitchFromNote(10),  // E4
-        }, 5));
+        }, CHOPSTICKS_SPEED));
         stages.add(new PianoRoll.Stage(new float[] {
                 PhonosUtil.pitchFromNote(6),  // C4
-        }, 5));
+        }, CHOPSTICKS_SPEED));
 
-        CHOPSTICKS = new PianoRoll(stages);
+        int halfSpeed = CHOPSTICKS_SPEED / 2;
+        if (Calendar.getInstance().get(Calendar.MONTH) == 3 && Calendar.getInstance().get(Calendar.DAY_OF_MONTH) == 1) {
+            stages.add(new PianoRoll.Stage(new float[] {
+                    PhonosUtil.pitchFromNote(1),
+            }, halfSpeed));
+            stages.add(new PianoRoll.Stage(new float[] {
+                    PhonosUtil.pitchFromNote(3),
+            }, halfSpeed));
+            stages.add(new PianoRoll.Stage(new float[] {
+                    PhonosUtil.pitchFromNote(6),
+            }, halfSpeed));
+            stages.add(new PianoRoll.Stage(new float[] {
+                    PhonosUtil.pitchFromNote(3),
+            }, halfSpeed));
+            for (int i = 0; i < 3; i++) {
+                stages.add(new PianoRoll.Stage(new float[] {
+                        PhonosUtil.pitchFromNote(6), PhonosUtil.pitchFromNote(10)
+                }, CHOPSTICKS_SPEED));
+            }
+            for (int i = 0; i < 3; i++) {
+                stages.add(new PianoRoll.Stage(new float[] {
+                        PhonosUtil.pitchFromNote(5), PhonosUtil.pitchFromNote(13)
+                }, CHOPSTICKS_SPEED));
+            }
+            for (int i = 0; i < 3; i++) {
+                stages.add(new PianoRoll.Stage(new float[] {
+                        PhonosUtil.pitchFromNote(8), PhonosUtil.pitchFromNote(13)
+                }, CHOPSTICKS_SPEED));
+            }
+            for (int i = 0; i < 3; i++) {
+                stages.add(new PianoRoll.Stage(new float[] {
+                        PhonosUtil.pitchFromNote(6), PhonosUtil.pitchFromNote(13)
+                }, CHOPSTICKS_SPEED));
+            }
+            stages.add(new PianoRoll.Stage(new float[] {
+                    PhonosUtil.pitchFromNote(6), PhonosUtil.pitchFromNote(10), PhonosUtil.pitchFromNote(15)
+            }, CHOPSTICKS_SPEED));
+        }
+
+        return new PianoRoll(stages);
+    }
+
+    private static void chopsticksCommonSection(List<PianoRoll.Stage> stages) {
+        for (int i = 0; i < 6; i++) {
+            stages.add(new PianoRoll.Stage(new float[] {
+                    PhonosUtil.pitchFromNote(11), // F4
+                    PhonosUtil.pitchFromNote(13)  // G4
+            }, CHOPSTICKS_SPEED));
+        }
+        for (int i = 0; i < 6; i++) {
+            stages.add(new PianoRoll.Stage(new float[] {
+                    PhonosUtil.pitchFromNote(10), // E4
+                    PhonosUtil.pitchFromNote(13)  // G4
+            }, CHOPSTICKS_SPEED));
+        }
+        for (int i = 0; i < 6; i++) {
+            stages.add(new PianoRoll.Stage(new float[] {
+                    PhonosUtil.pitchFromNote(8),  // D4
+                    PhonosUtil.pitchFromNote(17)  // B5
+            }, CHOPSTICKS_SPEED));
+        }
     }
 }