Laiv Harmony µDAC, Discrete Balanced R-2R DAC

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So I just tried the OS mode on my uDac for the first time today and was doing some back to back comparisons on some tracks comparing OS to NOS. I played 4 tracks and on each one I would get some distortion on OS. Seemed to only be when hitting maybe a certain frequency. Like on one track it was during a vocal. Another it was an electronic drum. It was pretty prominent and easily heard. Went back to NOS each time to repeat a 2nd time and nothing.

Anyone else using OS mode and finding any issues during playback?

EDIT: I powered it down and tried another amp and it didn't do it. I then put it back on my main amp and still didn't do it. So it appears it fixed itself when I powered off and on. Hopefully it doesn't return.

Did you see Iwii review the new Laid GanM monoblocks? What he explains about video sharpness. It starts at 9 minutes in. That is exactly how I use to describe oversampling (what I noticed on SD DACs). That algorithm fools you into thinking there is more detail. Look at that falcon.