I’ve tried everything the remove the hissing and hum from the QX1204USB to my speakers when plug into my laptop I even purchased a AVE VOX-HUM Eliminator a ground noise cancelling device with no luck I don’t get that noise going from my steinburg interface to my monitors nor do I get any noise from my tc-helicon voicelive 3 extreme I’ve tried going from the steinburg into the 2 track input on the mixer I’ve tried using the USB input straight to the laptop so I’ve given up on it it can not be used in a recording situation or to play backing tracks from my laptop it is no good as an interface.