In minecraft I gave the command / playsound to a command block and selected a sound effect that was displayed to me to select from the list. Then I put a lever on the block to try it out. It doesn't work. I tried other sounds. But nothing. Nothing can be heard, nothing is happening. Why?
Do you have to always be active or need redstone? Put it on always active and on repeat. If it doesn't work then I have no idea.