My home setup, purely for practicing is a small yamaha THR10 modeling amp, and a laptop that sits in a docking station attached to a keyboard and monitor. thats it. When the kids are asleep, i need to use headphones, so i need to put the laptop through the amp. This is easy, as the amp has an aux in, but when i connect the laptop using a 3.5mm jack cable, there is a lot of hissing, buzzing and general interference. it goes away completely if i unplug the laptop and just plug in my phone. I found the cause of the issue, its either the monitor or the monitor cable. Ill replace the cable, but what i am asking is will a USB audio interface to the laptop eliminate all that interference?