yeah i'm not having any luck with the 64k rom either.

Comments on the 88emu v. 2.2.25 (for my setup, Windows 11, loopmidi, 88emu with Sc-8850 or Sc-88):
- when using the internal midi player, the front panel of devices with more than 16 midi channels (e.g. Sc-88, Sc-8850) do not show any of the played instruments, because Part B (17-32) is used. The midi does not play back on multitimbral devices on parts 1-16

- playback of some midi files sound more sort of metallic when I use an external midi player like vanbasco and loopmidi. I do not know why, I don't think there is a different post processing of the sound on my computer. When I use the internal midi player it sounds compareable to the playback on the real hardware device (using vanbasco's karaoke player). I hear a clear difference especially when using special drum sounds (e.g. Timpani).

If other users do not have this issue then it may be related to my configuration.