It worked twice. The first time was to confirm which switch it was to shut it off so I wasn't mining at all. Second time was at 70~ish NOISE while I was mining. Third time I couldn't shut it off. I thought it was because I was at 80~ish NOISE and didn't have much time to shut it off before it reached 100. But the runs after that keeps me from turning the speaker off. I tried a new run but haven't reached the speaker warning again yet. I'll try again later, it's probably just my computer acting up instead of just a bug.