Metadata is wrong.
"void(Mournfinale) feat.Hoshiyuu Nankanagi" > "void (Mournfinale) feat. Hoshiyuu Nankanagi"
"Percussion Hey sound a#.wav" maybe should be switched to E♭ minor since the song is in this key.
"cymbal.wav" could be replaced by "push_scratch.wav".
"tom04.wav" could be applied to 02:46:774 in 70% volume.
You could repeat the same section of "tom02.wav" and "tom04.wav" (with "tom04.wav" being suggested in another modding) at 02:49:046
"audio.mp3" is not being utilized in any of the difficulties. Maybe you should delete it since you changed to mp3 for ogg.
Aren't the "EXCEED" diff should be renamed to "HEAVENLY" according to SDVX IV difficulty names and "Ranking Criteria / Difficulty Naming (SOUND VOLTEX: https://osu.ppy.sh/wiki/en/Ranking_Criteria/Difficulty_naming#sound-voltex)"?
00:10:986, 00:11:527, 00:11:797, 00:12:338, 00:12:878, 00:13:419, 00:13:689, 00:13:959, 00:14:230, 00:14:500 - Maybe you could add some "kick.wav" during these timestamps.
00:11:257 - I think that you should add this snare (https://cdn.discordapp.com/attachments/914149423481749564/970092198379028561/snare02.wav) for emphasis to these snare-clap parts (but with a low volume).
00:20:446 - Maybe you could replace the "cymbal.wav" with a reverse? For not hearing a cymbal hint within this section or a kick + cymbal combination.
00:20:716, 00:20:986, 00:21:257 - You should remove the "cymbal.wav" section for emphasis to the reverse (quoted on the previous suggestion).
00:21:527 - Maybe you should add a "kick.wav" to emphasis the other kick.
02:13:364 - 02:14:387: The "LR_Drum Rpd x2.wav" could be at 50% for a little more detailed conjunction with the music.
02:13:592: The "kick.wav" could be at 30% volume, to have a more clap-centric focus.
02:14:501: You could replace "electronic-neurofunk" for the same sound with a different pitch (I personally recommend +10% pitch).
02:15:012 - 02:15:140: You maybe could lower the volume of "tom01.wav" (02:15:012 - 02:15:069) to 35% for conjunction with the music, and the "LR_Drum Kick Low" .wav" to 25% for the same reason as "tom.wav"
Sorry for my bad english too, i hope that i helped!
I think that you should rename the artist field from "Silentroom vs Frums" to "Silentroom vs. Frums" (difference being vs and vs.)
This is because according to Ranking Criteria (Standardisation: https://osu.ppy.sh/wiki/en/Ranking_Criteria#rules.2):
"Any form of vs., VS, etc. must be written as vs. when used as an indicator for collaboration between two or more artists. Alternative casing may be used to match the rest of the field."
After some search, i found a corresponding sample for the mentioned part in this modding
(https://cdn.discordapp.com/attachments/920712818129514546/997515035331006484/Hey_sound_-_E_minor.wav)
You can rename the flie too :D
KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK NEM FUDENDO