I recently downloaded the Studio One 4 software but I’ve been having the same issue for number 3 and 4 where if I don’t have anything plugged into the headphone jack, the microphone will get picked up but won’t actually pick up anything and when I press play, it will do a loop where I last had it but it won’t play audio. Now when I have my headphones plugged in it’s fine. I never used to have this issue. I recently got a new laptop to use this software after using it on previous computers. I don’t believe the computer is an issue.