Hi, I’m using Audacity 2.3.3 on my Macbook Pro running Sierra. I used an earlier version of Audacity on years ago on a much earlier mac operating system with no problems when i digitised my LPs. Now with the latest Audacity and Sierra I’m getting flat lifeless recordings from my NAD Tape Deck. I’ve connected the deck via an amplifier to my Mac the same ways as before. Any suggestions of what could be the problem.