This R2R unit with NOS gets rid of that terrible digital glare that makes modern music sound like something other than what it is intended to sound like. I probably can't even faithfully describe the huge smile I got on my face while listening to this device for the first time. It is like having a really good turntable in your pocket. If you don't like the NOS at first, remember that this unit is also tuned so that OS filters sound as good as they can. Play with the settings, for which there are no meaningful instructions. It is actually pretty easy to customize the sound to your exact preferences. While instructions are severely lacking, the controls are actually fairly easy to learn how to use and apply. I simply cannot recommend highly enough that juicy NOS setting. On some tracks it doesn't sound much different, but especially on older music it can bring about an almost magic transformation into that pure analog sound. On some tracks the sound level gets noticeably louder with NOS enabled. The most likely explanation is that the digital filters used for oversampling is throwing away data. Data that makes the music sound better and gives that organic liquid feel to the music.