I don't know if it's normal but the wither plays the spawn sound many times when it's spawned and plays the death sound so many times when it dies.
Edit by [MCPE Helper] Zeb: When the Wither is spawned, the spawning sound is played multiple times, overlapping each other and creating a sort of reverb/echo effect. The same thing happens with the death sound when the Wither is dying and is about to explode.
Steps to reproduce:
- /summon wither
- Listen carefully to the spawning sound. Notice that it has a sort of reverb/echo effect that shouldn't be there. This is because the sound is playing multiple times and overlapping with the previous instances.
- /kill @e[type=wither]
- Listen carefully again. Notice that the same effect occurs.