I was correct about playlists: this is data from music.txt
Event	ID	Name			Wwise Object Path	Notes
	12957221	Playlist_Hiberheim_Entrance_new			\Music\Explore\Playlist_Hiberheim_Entrance_new	
	15272676	Playlist_Beach_new			\Music\Explore\Playlist_Beach_new	
	119257277	Playlist_HIB_WhiteWitch_new			\Music\Explore\Playlist_HIB_WhiteWitch_new	
	228175584	Playlist_Friendly_new			\Music\Explore\Playlist_Friendly_new	
	380813451	Playlist_LUC_GoblinVillage_new			\Music\Explore\Playlist_LUC_GoblinVillage_new	
	648636958	Playlist_HIB_Cave_new			\Music\Explore\Playlist_HIB_Cave_new	
	709302771	Playlist_Dungeon_new			\Music\Explore\Playlist_Dungeon_new	
	887107375	Playlist_MainTheme_new			\Music\Explore\Playlist_MainTheme_new	
	980077576	Music_Credits_Stop			\Music\Music_Credits_Stop	
	984018499	Playlist_Home_HallOfHeroes_new			\Music\Explore\Playlist_Home_HallOfHeroes_new	
	1106519134	Playlist_CharScreen			\Music\Explore\Playlist_CharScreen	
	1305191925	Playlist_KnightsTomb_new			\Music\Explore\Playlist_KnightsTomb_new	
	1491766670	Playlist_Boss_new			\Music\Explore\Playlist_Boss_new	
	1704042509	Music_Shroud_Enter			\Music\Music_Shroud_Enter	
	1728483233	Music_Shroud_Exit			\Music\Music_Shroud_Exit	
	1843872079	Music_Fight_End			\Music\Music_Fight_End	
	1865527937	Playlist_ImmaculateVillage_new			\Music\Explore\Playlist_ImmaculateVillage_new	
	1882971781	Music_Credits			\Music\Music_Credits	
	1940217408	Music_Game_Enter			\Music\Music_Game_Enter	
	2022618719	Playlist_CysMarketFade			\Music\Explore\Playlist_CysMarketFade	
	2227898505	Playlist_Sneaking_new			\Music\Explore\Playlist_Sneaking_new	
	2250386541	Audio_MainMenu_Enter			\Music\Menus\Audio_MainMenu_Enter	
	2250473094	Playlist_CysMarket_new			\Music\Explore\Playlist_CysMarket_new	
	2522405638	Playlist_Hiberheim_new			\Music\Explore\Playlist_Hiberheim_new	
	2629389560	Playlist_CysBeach_BC			\Music\Explore\Playlist_CysBeach_BC	
	2845638018	Playlist_Mute_Trans			\Music\Explore\Playlist_Mute_Trans	
	2884384370	Playlist_TavernFade			\Music\Explore\Playlist_TavernFade	
	2901597576	Playlist_Luc_Bard_1			\Music\Special\Playlist_Luc_Bard_1	
	2901597578	Playlist_Luc_Bard_3			\Music\Special\Playlist_Luc_Bard_3	
	2901597579	Playlist_Luc_Bard_2			\Music\Special\Playlist_Luc_Bard_2	
	2901597580	Playlist_Luc_Bard_5			\Music\Special\Playlist_Luc_Bard_5	
	2901597581	Playlist_Luc_Bard_4			\Music\Special\Playlist_Luc_Bard_4	
	2906175779	Playlist_Homestead_new			\Music\Explore\Playlist_Homestead_new	
	3019209822	Playlist_Beach_Start			\Music\Explore\Playlist_Beach_Start	
	3059316805	Playlist_Immaculate_new			\Music\Explore\Playlist_Immaculate_new	
	3235861421	Playlist_LUC_Silverglen_new			\Music\Explore\Playlist_LUC_Silverglen_new	
	3498131715	Playlist_Tavern_new			\Music\Explore\Playlist_Tavern_new	
	3674175934	Playlist_Forest_new			\Music\Explore\Playlist_Forest_new	
	3758903569	Playlist_CassandraTomb_new			\Music\Explore\Playlist_CassandraTomb_new	
	3825354510	Playlist_Undead_new			\Music\Explore\Playlist_Undead_new	
	3876948117	Playlist_BlackCove_new			\Music\Explore\Playlist_BlackCove_new	
	3986302892	Music_Fight_Start			\Music\Music_Fight_Start	
	4183273859	Playlist_Trollcave_new			\Music\Explore\Playlist_Trollcave_new	
and this is what is written afterwards:
treamed Audio	ID	Name	Audio source file	Generated audio file	Wwise Object Path	Notes
	5237137	Kirill Pokrovsky-Reborn	C:\Develop\ART_ASSETS\EyesOfAChild\Main\Data\Public\Main\Assets\Sound\.cache\Windows\sfx\kirill pokrovsky-reborn_3f237e3a.wem	5237137.wem	\Interactive Music Hierarchy\Music\Music_Game\Music_Shroud\Music_Explore\Playlist_Immaculate_new\Kirill Pokrovsky-Reborn\Kirill Pokrovsky-Reborn	
	15897208	Kirill Pokrovsky-Soul Cage (Part I)	C:\Develop\ART_ASSETS\EyesOfAChild\Main\Data\Public\Main\Assets\Sound\.cache\Windows\sfx\kirill pokrovsky-soul cage (part i)_727c4b9a.wem	15897208.wem	\Interactive Music Hierarchy\Music\Music_Game\Music_Shroud\Music_Explore\Playlist_Hiberheim Entrance_new\Kirill Pokrovsky-Soul Cage (Part I)\Kirill Pokrovsky-Soul Cage (Part I)	
	21299617	Kirill Pokrovsky-Shadowstorm	C:\Develop\ART_ASSETS\EyesOfAChild\Main\Data\Public\Main\Assets\Sound\.cache\Windows\sfx\kirill pokrovsky-shadowstorm_659f4219.wem	21299617.wem	\Interactive Music Hierarchy\Music\Music_Game\Music_Shroud\Music_Explore\Playlist_Dungeon_new\Kirill Pokrovsky-Shadowstorm\Kirill Pokrovsky-Shadowstorm	
as an example. 
problem is, I still don't get how customizable this is. nor I understand how to actually add new music, a customized track, say, for each area and for each battle in the area, nor how to make each boss battle enjoy its customized music. nor I understand how much the engine supports looping, cuepoints and other special effects.
EDIT: there are tracks from beyond divinity and divine divinity (sighs of elvenkind) as well 

 I see little, if nothingm from the Dragon Knight saga tho.
all .lsx files can be opened in Notepad++ 
it's very crude, but better than nothing.