[BullseyeHawk]

You're using SendClientMessageToAll, inside a loop. That scrolls over MAX_PLAYERS which is by default 500.
So.. It sends SendClientMessageToAll 500 times? Perfect!

For your next tutorial, before releasing it. Test it, and explain much more. A dynamic music command would be more better here. This stuff should probably go on the wiki for quick command show. Tho it should be in default order, not ZCMD.