Your current audio is 192kbps with 16.5KHz which isn't the best quality possible (also if it's around 16KHz it should be encoded to 128kbps and we don't want that). Heres a link to download a 192kbps with 19.1KHz that looks way better in Spectro!
Link to download the new audio: https://evil.s-ul.eu/Q8D0jqlc
(Timing is 97 not 97,1 and with this new audio you have to move everything -55ms and resnap objects)
There is a lot of muted objects on normal, hard and top diff due to them being mapped actively but having a 5% volume green line over them. Consider checking them out on mapset verifier since it detects most of it (also you can give a second glance in case you missed any)
Also try to avoid using 10% for really soft vocals as in game it is varely audible when playing with even audio settings (i.e 50% effect 50% music). Maybe going for a 25% could be better for these specific instances.
On sections like 00:05:802 having 70% volume is too loud considering the only thing going on in the music is the singer whispering. You did a good usage of this volume at 00:25:575 since this is a chorus it sounds balanced so consider tampering with the volumes a bit in calm sections so they don't feel as loud.
I'll leave some suggestions down below:
00:05:802 -> 40%
00:15:689 -> 50%
00:45:349 -> 50%
For sections like 00:59:561 maybe you could do an slowly increasing volume effect that would fit what the vocals are doing and would also fit the ideas implemented in the difficulties for this section.
01:02:650 -> 30%
01:05:122 -> 60%
01:24:896 -> 60%
01:29:839 to 01:30:766 -> 40%
01:34:782 -> 60%
02:04:442 -> 55%
02:24:216 -> 85%~
i don't agree the usage of 70% in 00:05:802 - sections is loud, the hs is here to add up to music. hence using samples, and i think they work esp in whispering parts.
10% volume is 10% for a reason. if i wanted ppl to hear hs i'd make it higher
00:59:561 - as you can see im varying usage of volumes here depending on the beat. so obviously my intention here was not to highlight vocals with the hs but beat
i appreciate the comment but i prefer to stick to my concept of hitsounding and if not necessary, would keep volumes as they are for a better feedback.