My recommendation would be to increase the volume of the songs a little, this is not the case with all of them, but some of the songs are heard very low for some reason.

引用自 jacksoon：

My recommendation would be to increase the volume of the songs a little, this is not the case with all of them, but some of the songs are heard very low for some reason.

I could do that I guess, but as far as I know it's impossible to do without an audio editing software. I've never done audio editing, so I don't have one. If you'd recommend me a free app then maybe I'll get to it someday.
I should really set up a patreon or something at this point... it takes hours to complete even 1 ost