Hi. I am almost brand new in gb. If I choose + then audio and microphone I get 3 options. From there I chosed last choice and clean guitar and amazing tweed and recorded that sound. I don't remember how, but assume I chosed that to track list and tabbed record button. So I got the recorded sound. So you see, no real external guitar is needed to get record audio sound. But now I do the same, only region appears, not the sound here. What is wrong? I replaced sierra to catalina and it needed to allow gb to use the microphone that my voice could be recorded (voice also didn't appeared).