Mixing this song was very quick this time, because the sound was pretty much up to date. The reason why a few days have passed since my last post is that shortly after completing song 4 I wanted to compare the sound with my reference song (song 10) again and was very dissatisfied. It didn't sound as spatial and transparent as the other song and I couldn't find the reason for it. So I analyzed and experimented for a long time without getting any satisfactory result.
So I decided to start with the next song to distract myself and get more distance from song 4. When song 5 was finished after a few hours and I went back to song 4, my plan was confirmed. Everything was clearer, and I knew very quickly what to do. Sometimes distance from something you are working on is the key to success.