I want to play a sound when picking up coins. But no sound happens.

The sound is valid since it works with the /playsound command.

Is this not the correct way to do it?

 

@SubscribeEvent
public void pickupItem(EntityItemPickupEvent event)
{
	Item item = event.item.getEntityItem().getItem();
	ItemStack stack = new ItemStack(item);
	int amount = stack.stackSize;

	EntityPlayer player = (EntityPlayer)event.entity;
	ExtendedPlayer props = ExtendedPlayer.get(player);

	if(item == TerraReg.copper_coin)
	{
		player.playSound(Main.modid + ":" + "getCoins", 1F, 1F);
		props.addMoney(1 * amount);
		event.item.setDead();
		event.setCanceled(true);
	}
}

How do you have the sound registered? as a "sound" or an "effect"?

I didn't know you could even register them as "effects"...

What Diesieben said. playSoundAtEntity is a woldObj method, just to help you find it.

Please, do tell me, what is a "worldObj method"?

 

(Question may or may not be serious).

bad wording, a method within the world class which can be obtained using player.worldObj. I noticed I could have worded that much better after I posted it. My bad.

As I would expect from you

Wouldn't she have to cancel the default sound when picking up an item before calling her own sound?