Place it at the exact moment of the foul, then follow it with the sad trombone for a failed play or crowd cheering when the call goes your way, keeping the whistle as the clear turning point before the reaction.
About this sound
This is a short referee whistle lasting just over two seconds, a sharp blast that cuts through the noise like a call on the field. It feels sudden and decisive, with a playful edge that turns an ordinary stop into a penalty moment, making listeners pause, laugh, and wait to see what happens next.