Hi esteban. I have just played through the CD and there are no other CD audio tracks that contain music (As far as I can tell). All I can presume is the other tunes that you are referring to are chip / HES.
01 HE System Warning
02 Data
03 Ripped (Cut at 58 seconds when the speech starts)
04 Speech
05 Speech
06 Ripped
07 Ripped
08 Speech
09 Speech
10 Speech
11 Speech
12 Speech
13 Speech
14 Speech
15 Speech
16 Speech
17 Speech
18 Speech
19 Speech
20 Speech
21 Data
22 Ripped
23 Ripped
24 Ripped
25 Ripped
26 Ripped
27 Ripped
28 Data
The tracks marked as data are so, as I checked the TOC over at
http://www.necstasy.net/