Uploaded stm_bgm_ev_last.isd (fails) and stm_bgm_ev_last2.isd (degraded) as well as their matching .ish files.
"stuff" versions ran fine in the past. It probably changed during the last month or two, but I can't pinpoint it exactly.
The files are in a directory with a lot of similarly named .ish and .isd files, all beginning with stm_bgm_. Maybe the files fail to play now because corresponding .ish and .isd files do not share the same short file name? They map as follows here:
Maybe this explains why stm_bgm_ev_last2.isd plays (mismatched ISH causes degraded quality) but stm_bgm_ev_last.isd won't (missing ISH).