There are cases where a long note's release can end up in the autoplay lanes. Try playing Brahms(O2 Remix)+ on HX. You can hear the double keysounds just as if they were long notes. I guess it surfaced beause Beautiful Day was a lazy notecharter (and mixer) and the NoteTool was just recently upgraded then to support long notes and had this design error.
There are cases where a long note's release can end up in the autoplay lanes. Try playing Brahms(O2 Remix)+ on HX. You can hear the double keysounds just as if they were long notes. I guess it surfaced beause Beautiful Day was a lazy notecharter (and mixer) and the NoteTool was just recently upgraded then to support long notes and had this design error.
Fix: