Hello,
Just received my STeinberg UR22 MKII Recording Pack no more than a week ago. Yesterday i noticed a hissing / white noise sound that continues to play in the background. Whenever i remove my charger from my laptop the noise is reduced significantly but continues, or even when im typing my hands on the keyboard it also reduces this noise. It was weird but i noticed that while i was charging my phone on the laptop. Whenever i held my phone to noise would also reduce.