Takes away any tracks that play at night time, mimicking the SoC style of music-less nighttime atmosphere.
To my understanding, SoC not having any music at night was actually a bug, but I honestly prefer it that way. Makes night time a lot more unnerving and distinct compared to daytime.
If you want to play around with the level music yourself, the way the game_levels_music.ltx values work is as follows:
[level_name]
file_path\sound_name = (starting hour), (ending hour), (base volume), (unknown value), (unknown value)
EXAMPLE
[zaton_musics]
music\zaton_day = 5, 22, 0.2, 2, 4