I read the tuotrial in the forge wiki(though it's outdated and only compatitable with 1.3.2) and try exactly as it said

first I created a class called SoundEvents

public class CBCSoundEvents {

@ForgeSubscribe
public void onSound(SoundLoadEvent event)
{

	System.out.println("but a simple try");
	File file=new File("/mod/sounds/pin.wav");
	if(file==null){
			System.err.println("Fail to load the damn file.>)");
			return;
	} 
	System.out.println(file.getPath());
	try{
		SoundPoolEntry snd = event.manager.soundPoolSounds.addSound("abc", file);
		System.out.println(snd.soundName);
	}catch(Exception e){

		System.out.println("Sound registering failed.");

	}
}
}

 

at @PreInit method of my mod I added this:

MinecraftForge.EVENT_BUS.register(new CBCSoundEvents());

 

and at my Item's onItemRightClick method I added this:

par2World.playSoundAtEntity(par3EntityPlayer, "abc", 0.5F, 0.4F / (itemRand.nextFloat() * 0.4F + 0.8F));

 

Clearly it doesn't work.

The debug console shows "but a simple try" ,which indicates the function has been registered successfully,

also File loading and path printing works fine

but when it try to add sound there's an error.

2013-02-20 19:15:42 [iNFO] [sTDERR] java.lang.StringIndexOutOfBoundsException: String index out of range: -1
2013-02-20 19:15:42 [iNFO] [sTDERR] 	at java.lang.String.substring(String.java:1911)
2013-02-20 19:15:42 [iNFO] [sTDERR] 	at net.minecraft.client.audio.SoundPool.addSound(SoundPool.java:63)
2013-02-20 19:15:42 [iNFO] [sTDERR] 	at net.minecraft.client.audio.SoundPool.addSound(SoundPool.java:42)
2013-02-20 19:15:42 [iNFO] [sTDERR] 	at cbproject.misc.CBCSoundEvents.onSound(CBCSoundEvents.java:29)
2013-02-20 19:15:42 [iNFO] [sTDERR] 	at net.minecraftforge.event.ASMEventHandler_4_CBCSoundEvents_onSound_SoundLoadEvent.invoke(.dynamic)
2013-02-20 19:15:42 [iNFO] [sTDERR] 	at net.minecraftforge.event.ASMEventHandler.invoke(ASMEventHandler.java:35)
2013-02-20 19:15:42 [iNFO] [sTDERR] 	at net.minecraftforge.event.EventBus.post(EventBus.java:103)
2013-02-20 19:15:42 [iNFO] [sTDERR] 	at net.minecraft.client.audio.SoundManager.loadSoundSettings(SoundManager.java:80)
2013-02-20 19:15:42 [iNFO] [sTDERR] 	at net.minecraft.client.Minecraft.startGame(Minecraft.java:442)
2013-02-20 19:15:42 [iNFO] [sTDERR] 	at net.minecraft.client.MinecraftAppletImpl.startGame(MinecraftAppletImpl.java:44)
2013-02-20 19:15:42 [iNFO] [sTDERR] 	at net.minecraft.client.Minecraft.run(Minecraft.java:744)
2013-02-20 19:15:42 [iNFO] [sTDERR] 	at java.lang.Thread.run(Thread.java:722)
2013-02-20 19:15:42 [iNFO] [sTDOUT] Sound registering failed.

It says "String out of index" so I think the problem is exactly at here.

Am I using the wrong methods or doing anything wrong with the EventBus?

Using event.manager.addSound("abc",ModClass.class.getResource("path")) also won't work

Help me plz , I really don't know what to do now :'(

BTW:If I delete the [soundPoolEntry snd = ] the console won't show any error,but the sound still isn't loaded xDD

so what I should do is change "abc" to "mymod.abc"?

I think I get the point ..I'll try it,thanks >)