craftbukkit/nms-patches/net/minecraft/world/level/block/BlockNote.patch

--- a/net/minecraft/world/level/block/BlockNote.java
+++ b/net/minecraft/world/level/block/BlockNote.java
@@ -48,7 +48,8 @@
 
         if (flag1 != (Boolean) iblockdata.getValue(BlockNote.POWERED)) {
             if (flag1) {
-                this.playNote(world, blockposition);
+                this.playNote(world, blockposition, iblockdata); // CraftBukkit
+                iblockdata = world.getBlockState(blockposition); // CraftBukkit - SPIGOT-5617: update in case changed in event
             }
 
             world.setBlock(blockposition, (IBlockData) iblockdata.setValue(BlockNote.POWERED, flag1), 3);
@@ -56,9 +57,14 @@
 
     }
 
-    private void playNote(World world, BlockPosition blockposition) {
+    private void playNote(World world, BlockPosition blockposition, IBlockData data) { // CraftBukkit
         if (world.getBlockState(blockposition.above()).isAir()) {
-            world.blockEvent(blockposition, this, 0, 0);
+            // CraftBukkit start
+            org.bukkit.event.block.NotePlayEvent event = org.bukkit.craftbukkit.event.CraftEventFactory.callNotePlayEvent(world, blockposition, data.getValue(BlockNote.INSTRUMENT), data.getValue(BlockNote.NOTE));
+            if (!event.isCancelled()) {
+                world.blockEvent(blockposition, this, 0, 0);
+            }
+            // CraftBukkit end
         }
 
     }
@@ -70,7 +76,7 @@
         } else {
             iblockdata = (IBlockData) iblockdata.cycle(BlockNote.NOTE);
             world.setBlock(blockposition, iblockdata, 3);
-            this.playNote(world, blockposition);
+            this.playNote(world, blockposition, iblockdata); // CraftBukkit
             entityhuman.awardStat(StatisticList.TUNE_NOTEBLOCK);
             return EnumInteractionResult.CONSUME;
         }
@@ -79,7 +85,7 @@
     @Override
     public void attack(IBlockData iblockdata, World world, BlockPosition blockposition, EntityHuman entityhuman) {
         if (!world.isClientSide) {
-            this.playNote(world, blockposition);
+            this.playNote(world, blockposition, iblockdata); // CraftBukkit
             entityhuman.awardStat(StatisticList.PLAY_NOTEBLOCK);
         }
     }