Unity: Attach to game objects that can be picked up (collider2d, isTrigger). Play audio if it exists on game object.

pickups.js

#pragma strict

public var pickupValue : int = 5;

function OnTriggerEnter2D(other : Collider2D)
{
	var gObj : GameObject = other.gameObject;
	var clip : AudioClip;
	
	if (gObj.CompareTag("Player"))
	{
	  // Add pickupValue to total treasure amount
		if (gameObject.audio)
		{
			clip = gameObject.audio.clip;
			AudioSource.PlayClipAtPoint(clip, new Vector3 (5, 1, 2));		
		}
		Debug.Log("Grabbed treasure! " + gameObject.name + " " + pickupValue + " points!" );
		Destroy(gameObject);
	}
}