Unmute active object.
eg: 00:20:764 (1,2) 00:23:106 (3,4) 00:24:715 (3) 00:25:447 (3,4) and etc.
i would replace the first combo colour with something brighter as it is very difficult to differentiate with 100% dimmed background right now
As an addition to my post with muted hitnormal sounds #2919920 I would also like to comment on overall hitsounding of the map:
There's a large tendency to use different hitsounds for some objects while the music being the same for the whole part. One of the examples of such tendency may be found in the beginning of the map with whistles on 00:00:898 - 00:03:203 - which do not really help to represent the music nor rely on something in it. Another example might be this 00:16:081 - where the music keeps being the same throughout the part while having this sound to differ a lot. And probably the most significant example is the usage of those clap sounds in the calm section 00:48:788 - 00:48:862 - etc which sound completely random while the song being calm.
I would highly recommend you to consider working on your hitsounding in a way that would represent the song closer.