You can’t really test such a software at home. You need to test in the live environment, too. Yes, I tested it at home, before. But I did not recognize that there was this jingle. It’s like all other stuff. The DJ software, the drivers, the operating system, … There remains always a risc, that something will not work. But in this case, it’s really unnecessary and useless. Actually, I decided to test it at a less important event.