To make sure it was adjusting as it said it was, I toook the adjusted tracks from this program and put it on a flash drive. Actually, this is the best I have found to MP3 Gain that I loved when I had a Windows machine. If you do that, you will find this program works very well as I have. A minor hassle, but if you keep it to doing 50 tracks or less at a time, you should be fine. Well, it will crash if you try to load a big folder. The previous reviewer gave this app one star for crashing.