Hello, I wanted to ask a question about the Presonus Studio 68 interface, I hope some user of this or understood in the subject can answer me the issue is to know if it is noemal that by lowering completely the knobs of the speakers and headphones still hear some sound ? It's almost imperceptible, but I wonder if it's normal. In summary: if, for example, you are playing any type of song and you have the volume at 0, are you still listening to something from the song you are playing? I must say that you have to approach the speaker to find out. I'm sorry if my question is a bit complicated to understand, but I hope you can help me. Regards!