This got downvoted, so let me rephrase: "Unfortunately, where you listed the example of 'badly behaving apps' as one of the sounds it does play, this shows tha

This got downvoted, so let me rephrase: "Unfortunately, where you listed the example of 'badly behaving apps' as one of the sounds it does play, this shows that in many cases the only way to be sure that it will not play sounds is to turn the power off. That is the only way to know this will not happen."