Mantis#2656. Thank you kindly, Nlin for a patch that:

Attached patch implements llCollisionSound. Thanks T. Sado.

OpenSim/Data/MySQL/MySQLRegionData.cs

@@ -981,6 +981,9 @@ namespace OpenSim.Data.MySQL
             createCol(prims, "ClickAction", typeof (Byte));
             createCol(prims, "Material", typeof (Byte));
 
+            createCol(prims, "CollisionSound", typeof(String));
+            createCol(prims, "CollisionSoundVolume", typeof(Double));
+
             // Add in contraints
             prims.PrimaryKey = new DataColumn[] {prims.Columns["UUID"]};
 
@@ -1271,6 +1274,9 @@ namespace OpenSim.Data.MySQL
             if (!row.IsNull("ClickAction"))
                 prim.ClickAction = Convert.ToByte(row["ClickAction"]);
 
+            prim.CollisionSound = new UUID(row["CollisionSound"].ToString());
+            prim.CollisionSoundVolume = Convert.ToSingle(row["CollisionSoundVolume"]);
+
             return prim;
         }
 
@@ -1589,6 +1595,9 @@ namespace OpenSim.Data.MySQL
             row["ClickAction"] = clickAction;
 
             row["Material"] = prim.Material;
+
+            row["CollisionSound"] = prim.CollisionSound.ToString();
+            row["CollisionSoundVolume"] = prim.CollisionSoundVolume;
         }
 
         /// <summary>

OpenSim/Data/MySQL/Resources/022_RegionStore.sql

@@ -0,0 +1,6 @@
+BEGIN;
+
+ALTER TABLE prims ADD COLUMN CollisionSound char(36) not null default '00000000-0000-0000-0000-000000000000';
+ALTER TABLE prims ADD COLUMN CollisionSoundVolume float not null default 0.0;
+
+COMMIT;

OpenSim/Data/SQLite/Resources/015_RegionStore.sql

@@ -0,0 +1,6 @@
+BEGIN;
+
+ALTER TABLE prims ADD COLUMN CollisionSound varchar(36) NOT NULL default '00000000-0000-0000-0000-000000000000';
+ALTER TABLE prims ADD COLUMN CollisionSoundVolume float NOT NULL default 0;
+
+COMMIT;

OpenSim/Data/SQLite/SQLiteRegionData.cs

@@ -877,6 +877,9 @@ namespace OpenSim.Data.SQLite
 
             createCol(prims, "Material", typeof(Byte));
 
+            createCol(prims, "CollisionSound", typeof(String));
+            createCol(prims, "CollisionSoundVolume", typeof(Double));
+
             // Add in contraints
             prims.PrimaryKey = new DataColumn[] {prims.Columns["UUID"]};
 
@@ -1237,6 +1240,10 @@ namespace OpenSim.Data.SQLite
             prim.ObjectSaleType = Convert.ToByte(row["SaleType"]);
 
             prim.Material = Convert.ToByte(row["Material"]);
+
+            prim.CollisionSound = new UUID(row["CollisionSound"].ToString());
+            prim.CollisionSoundVolume = Convert.ToSingle(row["CollisionSoundVolume"]);
+
             return prim;
         }
 
@@ -1564,6 +1571,9 @@ namespace OpenSim.Data.SQLite
 
             row["SalePrice"] = prim.SalePrice;
             row["Material"] = prim.Material;
+
+            row["CollisionSound"] = prim.CollisionSound.ToString();
+            row["CollisionSoundVolume"] = prim.CollisionSoundVolume;
         }
 
         /// <summary>

OpenSim/Region/Environment/Scenes/SceneObjectPart.cs

@@ -201,6 +201,10 @@ namespace OpenSim.Region.Environment.Scenes
         private Vector3 m_cameraAtOffset = new Vector3(0.0f, 0.0f, 0.0f);
         private bool m_forceMouselook = false;
 
+        // TODO: Collision sound should have default.
+        private UUID m_collisionSound = UUID.Zero;
+        private float m_collisionSoundVolume = 0.0f;
+
         #endregion Fields
 
         #region Constructors
@@ -952,6 +956,22 @@ if (m_shape != null) {
             set { m_sitAnimation = value; }
         }
 
+        public UUID CollisionSound
+        {
+            get { return m_collisionSound; }
+            set
+            {
+                m_collisionSound = value;
+                aggregateScriptEvents();
+            }
+        }
+
+        public float CollisionSoundVolume
+        {
+            get { return m_collisionSoundVolume; }
+            set { m_collisionSoundVolume = value; }
+        }
+
         #endregion Public Properties with only Get
 
         
@@ -1607,6 +1627,12 @@ if (m_shape != null) {
             if (m_parentGroup.IsDeleted)
                 return;
 
+            // play the sound.
+            if (startedColliders.Count > 0 && CollisionSound != UUID.Zero && CollisionSoundVolume > 0.0f)
+            {
+                SendSound(CollisionSound.ToString(), CollisionSoundVolume, true, (byte)0);
+            }
+
             if ((m_parentGroup.RootPart.ScriptEvents & scriptEvents.collision_start) != 0)
             {
                 // do event notification
@@ -3233,7 +3259,8 @@ if (m_shape != null) {
             if (
                 ((AggregateScriptEvents & scriptEvents.collision) != 0) ||
                 ((AggregateScriptEvents & scriptEvents.collision_end) != 0) ||
-                ((AggregateScriptEvents & scriptEvents.collision_start) != 0)
+                ((AggregateScriptEvents & scriptEvents.collision_start) != 0) ||
+                (CollisionSound != null && CollisionSound != UUID.Zero)
                 )
             {
                 // subscribe to physics updates.
@@ -3252,6 +3279,13 @@ if (m_shape != null) {
                     PhysActor.OnCollisionUpdate -= PhysicsCollision;
                 }
             }
+
+            if (m_parentGroup == null)
+            {
+                ScheduleFullUpdate();
+                return;
+            }
+
             if ((GetEffectiveObjectFlags() & (uint)PrimFlags.Scripted) != 0)
             {
                 m_parentGroup.Scene.EventManager.OnScriptTimerEvent += handleTimerAccounting;
@@ -3363,3 +3397,4 @@ if (m_shape != null) {
 
 
 
+

OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs

@@ -3490,7 +3490,23 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         public void llCollisionSound(string impact_sound, double impact_volume)
         {
             m_host.AddScriptLPS(1);
-            NotImplemented("llCollisionSound");
+            //NotImplemented("llCollisionSound");
+
+            // TODO: Parameter check logic required.
+            UUID soundId = UUID.Zero;
+            if (!UUID.TryParse(impact_sound, out soundId))
+            {
+                foreach (TaskInventoryItem item in m_host.TaskInventory.Values)
+                {
+                    if (item.Type == (int)AssetType.Sound && item.Name == impact_sound)
+                    {
+                        soundId = item.AssetID;
+                        break;
+                    }
+                }
+            }
+            m_host.CollisionSound = soundId;
+            m_host.CollisionSoundVolume = (float)impact_volume;
         }
 
         public void llCollisionSprite(string impact_sprite)