OK, maybe I'm deaf... I used the following audio interfaces on my computer: iBasso DX-50 (USB) Radio Shack DA-710 DAC (optical connector) Steinberg UR-12 (USB) Internal Realtek ALC892 audio out The outputs of all these were fed (one at a time) to the line input of a Parasound PHP-850 preamp, and the tape out of the Parasound was connected to the line in of a Sony PCM-M10, which was set to record WAVs at 96K/24. I recorded a track from the Metheny, McBride, Sanchez album ("Son of Thirteen") through each of the interfaces. I used Foobar's ABX utility to compare the wav files from them, and the original wav that was ripped from the CD. The only difference I heard was the iBasso was a little bit warmer (actually muddier - with a loss of lower midrange detail), but the difference was very subtle. I was listening through RHA MA750i IEMs. I was hoping for immediate improvements as I went from on-board to Radio Shack to Steinberg to iBasso. I guess not... Anyone else have similar results?