if (!playingMenuMusic)
        {
            /**
             * Location, volume?, pitch, ? , ?, ?
             * */
            mc.getSoundHandler().playSound(backgroundMusic);
            playingMenuMusic = true;
        }

So I have my new main menu music on the gui that I have replaced and it works. You can hear the new music but the issue is were that the regular minecraft music you can still hear in the background so like both are on. How could I disable the minecraft music?

You could listen to forge's PlaySoundEvent, check if the sound being played is the main menu music and set it to null if it is.

Alright I got this in my eventhandler class:

@SubscribeEvent
public static void onSounds(PlaySoundEvent event)
{
    
}

but I don't know what to do next to disable the sounds

8 minutes ago, FireIsH0t said:

I don't know what to do next to disable the sounds

 

Which part of

54 minutes ago, V0idWa1k3r said:

check if the sound being played is the main menu music and set it to null if it is

did you not understand?

Try checking if the current open GUI is the MainMenu, and if so set the sound of the event to null with PlaySoundEvent#setResultSound

Alright good morning, I am back.

@SubscribeEvent
public static void onSounds(PlaySoundEvent event)
{
    event.setResultSound(null);
}

I try this and it does disable ALL the sounds like every one but it disables my sounds to that I put into the mod.

12 hours ago, V0idWa1k3r said:

check if the sound being played is the main menu music

Don't just blindly cancel every sound, compare it first. You have the original sound at PlaySoundEvent#getSound, and it contains methods like ISound#getSoundLocation that you can easily use to check what the sound is.