My MD is hooked up to my amp through the front jack. I usually have the MD's volume at max. Rolling Thunder is too loud in a bunch of tunes which leads to crackling and flutter in sounds like the last chord in track 1 and the piano stuff in track 7. It actually sounds fine if I reduce the volume on the MD. And yes, there is some skipping in Main BGM 1 and its missing some percussion and has also some stuff mapped to the wrong instrumets. There is also a very faint high pitched noise in the background on that track. Here is a short comparison of arcade and MD version: https://filebin.net/477lzc9w4nmyt9bt