How to play the lv up sound?

How to play the Level up sound?
It is possible?

Check here first for the sound you want https://github.com/PocketMine/PocketMine-MP/tree/master/src/pocketmine/level/sound

and

I used google to find this. --> https://forums.pocketmine.net/threads/what-is-the-function-to-play-a-sound-to-the-player.8944/

Thank for answering, I checked the sound phps. But, I cloudn't find the sound.
And I know how to play with addSound()

Can play the Level up sound?

Why don't try to actually update the exp for a tick and the removing it again?

I see. Thank you.