Scratchy Sound...!?

I saw a video on youtube about people mixing their voices and making SFX and when they added all together IT WAS SICK! But when I buyed it, as soon as I record my voice and I play it back.... It sounds very scratchy as an my mic is broken, tried it on another device and it still did it.... Waste of money here. Not rating 5 stars till it gets fixed. PS I was reading some reviews and other people like me have the same problem.

Hunter639164829198383 about VoiceJam: Vocal Looper - Sing, Loop, Share, v1.3.50