Yes, sure I have played (hundreds of hours actually
), the audio is downgraded in order for it to fit into the arcade PCB. The problem is that because of that you can't tell for sure if those "clicks" of high fequencies are actually there or not.
However, thinking about it now, this happens mostly on the Guwange tracks (the only esprade track to sound "weird" is Desperate School, but if I'm not wrong, it already sounded like that in the original DDP/ESP OST), so I'm willing to bet that all this is actually intentional, as most of the clicks repeat in similar points on the tracks I mentioned. I guess I'll have to wait for a gamemp3s rip or something to pop out to confirm it.