Playback not playing

Just moved on to a decent mic and am using the Steinberg UR12 interface. Everything works well except for playback. The verbiage I recorded is replaced by a strange machine sound and the moving marker line moves real slow. The only error I get is something has not ‘migrated’. Everything works well in Reaper, so far. Any ideas? The drivers for the Steinberg loaded smoothly.

Win 10

Which sample rate and bit depth are you using? I see the Steinberg is happy with 192 KHz, 24-bit as a top end, but I think I would start with CD quality, 44,100KHz 16-bit just to see if it works. Since you upgraded your system hardware, I suspect there is the temptation to up the digital sound quality, too.