My biggest problem with the product is that it doesn't come with clear instructions. There were instructions online for placing the mic, but they weren't in the box. "Backing track volume" is what you need to hear everything you're not recording, which I wasn't aware of. The red buttons have no explanation. I found the information I made about her because someone else asked on Revane's website. Too bad because the reverb effect is more nuanced than I might have known without it, the voice change has a few options I wouldn't have known about. I haven't tried it but the exclude button sounds really cool and the sound button sounds very useful. I don't know what crack or MCs do