Yes, it does feel strange at first, and in some ways forces one to reassess what one likes about music. I first started using USB as the input for Mojo, and eventually managed to remove 99%+ of the clicks and pauses, by using ferrites. I then compared some choral music, using both the usb and optical inputs. usb input was clean with a touch of brightness, that made it feel like I was at the recording optical input was clean, but felt slightly dull compared to usb My initial reaction was that usb was better. Then I went and listened to live choral music of the same genre, and discovered that it lacked the usb brightness - optical had provided a closer match to real life. After that i have used optical input almost all the time, and now don't miss the usb brightness. Bear in mind that it is a sound engineers trick, to liven up dull music, by adding an amount of electrical noise. Posts about power supplies often bring this discovery back to mind. So often people post that they added some new supply, but it made things sound dull, so they have replaced it with another power supply that gives more brightness/sharpness/definition, etc. What they are really saying, if only they realised it, is that they found a power supply that removed RFI and noise from their system, but didn't like it, so they have replaced it with a new supply that pumps plenty of RFI and noise back in - and it is impossible to convince them that they have wasted their money.