I've Bluebird & AT2020 microphone along with Roland Quad-capture interface, ART Tube preamp and Fl studio 12. I tried both microphones but I'm getting vocal distortion and noise even below -12 db gain level. If I record below that level, it records fine but I'm unable to increase gain above that level and it causes significant vocal distortion and noise. I used different mic & pop-filter positions, different XLR cables but got the same issue. Any body knows the reason for that?