songlist.2da

This file assigns the MUS file to certain values and is used by scripting and ARE files to determine what music should be played.
The first column is filled by numbers used by ARE files song sections and scripting commands like PlaySong().
The second one contains of descriptions /identifiers (I have no idea if they can be used instead of values in scripts).
And third one contains of MUS files references that describes what ACM sound files are used and how to play song.

In BG2EE we have:
2DA         V1.0
****
           Name        RESOURCE    
0          G3Blank     G3Blank.MUS 
1          Area0011    MX0011.MUS
2          Area0012    MX0012.MUS
3          Area0013    MX0013.MUS
4          Area0015    MX0015.MUS
5          Area0020    MX0020.MUS
6          Area0021    MX0021.MUS
7          Area0202    MX0202.MUS
8          Area0204    MX0204.MUS
9          Area0300    MX0300.MUS
10         Area0313    MX0313.MUS
11         Area0400    MX0400.MUS  
12         Area0404    MX0404.MUS  
13         Area0410    MX0410.MUS  
14         Area0414    MX0414.MUS  
15         Area0500    MX0500.MUS  
16         Area0512    MX0512.MUS  
17         Area0516    MX0516.MUS  
18         Area0602    MX0602.MUS  
19         Area0700    MX0700.MUS
20         Area0900    MX0900.MUS
21         Area1100    MX1100.MUS  
22         Area1200    MX1200.MUS  
23         Area1201    MX1201.MUS  
24         Area1300    MX1300.MUS  
25         Area1304    MX1304.MUS  
26         Area1400    MX1400.MUS  
27         Area1500    MX1500.MUS  
28         Area1600    MX1600.MUS  
29         Area1900    MX1900.MUS
30         Area2000    MX2000.MUS
31         Area2100    MX2100.MUS  
32         Area2300    MX2300.MUS  
33         BG2Theme    THEME.MUS   
34         Aerie       MXAERIE.MUS 
35         Anomen      MXANOM.MUS  
36         Jaheira     MXJAHIR.MUS 
37         Kalah       MXKALAH.MUS 
38         Khalid      MXKHALI.MUS 
39         ShadowThief MXTHIEF.MUS
40         Viconia     MXVICON.MUS
41         Tavern1     TAV1.MUS    
42         Tavern2     TAV2.MUS    
43         Tavern3     TAV3.MUS    
44         Tavern4     TAV4.MUS    
45         Area0400n   MX0400N.MUS 
46         BC1         BC1.MUS     
47         BC2         BC2.MUS     
48         BD1         BD1.MUS     
49         BD2         BD2.MUS
50         BD3         BD3.MUS
51         BF1         BF1.MUS     
52         BF2         BF2.MUS     
53         BJR         BJR.MUS     
54         BM1         BM1.MUS     
55         BM2         BM2.MUS     
56         BP1         BP1.MUS     
57         BP2         BP2.MUS     
58         BRD         BRD.MUS     
59         BSD         BSD.MUS
60         BST         BST.MUS
61         Area0406    MX0406.MUS  
62         Harp_V2     HARP_V2.MUS 
63         Harp_V6     HARP_V6.MUS 
64         Area1602    MX1602.MUS  
65         Area2202    MX2202.MUS  
66         Tavern5     TAV5.MUS    
67         Tavern6     TAV6.MUS    
68         Dream1      Dream1.mus  
69         Dream2      Dream2.mus
70         Mb          Mb.mus
71         Mx4000      Mx4000.mus
72         Mx4500      Mx4500.mus  
73         Mx5000      Mx5000.mus  
74         Mx5200      Mx5200.mus  
75         Mx5500      Mx5500.mus  
76         Mx6000      Mx6000.mus  
77         Mx6100      Mx6100.mus  
78         Mx6200      Mx6200.mus
79         MxMelis     MxMelis.mus
80         Vb          Vb.mus
81         ThemeT      THEMET.mus  
82         Cred        Cred.mus    
83         NPC         NPC.mus     
84         Neera1      NFB.MUS
85         Neera2      NRW.MUS
86         Dorn1       DRH.MUS
87         Dorn2       MXDORN.MUS
88         Neera       MXNEER.MUS
89         Rasaad      MXRASAD.MUS
90         Hexxat      MXHEXX.MUS
91         OH4000      OH4000.MUS
92         OH4101      OH4101.MUS
93         OH4220      OH4220.MUS
94         OH5100      OH5100.MUS
95         OH5200      OH5200.MUS
96         OH6100      OH6100.MUS
97         OH6200      OH6200.MUS
98         OH7000      OH7000.MUS
99         OH7100      OH7100.MUS
100        OH7200      OH7200.MUS
101        OH7300      OH7300.MUS
102        BPC1        BPC1.MUS
103        BPC2        BPC2.MUS
104        BPC3        BPC3.MUS
105        BPSTG       BPSTG.MUS
106        BPTHEME     BPTHEME.MUS