diff --git a/Scripts/Scenes/Play/Audio/BGM.cs b/Scripts/Scenes/Play/Audio/BGM.cs
index 52b4f64..7fd0736 100644
--- a/Scripts/Scenes/Play/Audio/BGM.cs
+++ b/Scripts/Scenes/Play/Audio/BGM.cs
@@ -49,6 +49,8 @@ public partial class BGM : AudioStreamPlayer
 				var buffer = f.GetBuffer((long)f.GetLength());
 
 				/// WAV HEADER PARSING ///
+				/// https://medium.com/swlh/reversing-a-wav-file-in-c-482fc3dfe3c4
+				
 				// bit format
 				var bf = new byte[]{ buffer[34], buffer[35] };
 				var bitFormat = BitConverter.ToUInt16(bf) switch
diff --git a/Scripts/Things/TunnelObjects/THNoteHold.cs b/Scripts/Things/TunnelObjects/THNoteHold.cs
index 0d7f037..4667a59 100644
--- a/Scripts/Things/TunnelObjects/THNoteHold.cs
+++ b/Scripts/Things/TunnelObjects/THNoteHold.cs
@@ -26,14 +26,15 @@ namespace WacK.Things.TunnelObjects
             holdScroll.AddChild(longThing);
             longThing.Position = new Vector2(0, (float)-holdData.time * Play.ScrollPxPerSec);
 
-            // only draw visible hold-mids
-            var drawableMids = holdData.points.Values.Where(e => e.type == NotePlayType.HoldMid || e.type == NotePlayType.HoldEnd).ToList();
+            // don't draw invisible hold-mids
+            var drawableMids = holdData.points.Values.Where(e => e.type != NotePlayType.HoldMidInvis).ToList();
             if (drawableMids.Count > 0)
             {
                 var lastMid = holdData.points.Values[^1];
                 if (drawableMids[^1] != lastMid) drawableMids.Add(lastMid);
             }
-            else // would most likely happen if HoldEnd is missing
+            else
+                // would most likely happen if HoldEnd is missing
                 drawableMids = holdData.points.Values.ToList();
 
             if (drawableMids.Count() > 0)