In STD, mappers tend to mute some slider ends because they don't have to be clicked. This can be quite jarring in CTB, because slider ends must be caught like any other object. This is especially true for HD players who rely on strong feedback, because they can't see the fruit landing. Here are a few instances where you can increase volume:
02:25:946
02:45:425
From 03:08:207 to 03:10:832
From 03:20:207 to 03:21:332
You can remove all of these 5 or 10% volume green lines or increase their volume to at least 20%