I was wondering this: When you take a laptop and connect it to an audio interface (Steinberg UR22mk2) via a 3.5mm line to 6.3mm line, aka plug the laptops analogue output into the interfaces analogue input it sounds terrible.
With "proper" use, aka getting the input by a microphone or an instrument and the sound input by USB its all just how you'd expect it.
Note: It was a stereo 3.5 to 6.3 mm line cable that connected the laptops analogue out and the interfaces analogue input