A suggestion would be a sound where the iris block an item or a player. As well an API event (irisCollisionDetected) can be created to monitor iris collisions. If you want, you could as well make that the API can see the ID of the item that has pass trought the vortex. (ID 0 = living or unknown entity). But if it's a living entity, you cannot see its type (for a mob) or its name (for a player).
Big bang sound for a living entity, little band sound for other entities, like items and arrows.
You can do that potion splash does their effet around the stargate even if the iris is closed, but not if the shield is up (from my shield suggestion).
A suggestion would be a sound where the iris block an item or a player. As well an API event (irisCollisionDetected) can be created to monitor iris collisions. If you want, you could as well make that the API can see the ID of the item that has pass trought the vortex. (ID 0 = living or unknown entity). But if it's a living entity, you cannot see its type (for a mob) or its name (for a player).
Big bang sound for a living entity, little band sound for other entities, like items and arrows. You can do that potion splash does their effet around the stargate even if the iris is closed, but not if the shield is up (from my shield suggestion).