Everything you hear here comes from running the cartridge's own sound engine (latido_del_sonido, 0x4BFF, and suena, 0x4B6E, which hands it the voices; the interrupt calls it) on an emulated Z80, frame by frame at 60 per second, just as the game calls it. What the engine writes to the PSG is turned into sound with an AY-3-8910 (tools/musica.py). Each MP3 is the whole piece up to where it starts again, plus 8 seconds of the repeat fading out; those that do not repeat end where the engine ends.
The PSG writes have been compared frame by frame with those of openMSX (C-BIOS MSX1 japonés). In every frame the PSG ends up the same:
The timbre is not checked: it is a textbook AY-3-8910, not a recording of the emulator. The probes are tools/omsx_psg.tcl and tools/coteja_psg.py.
suena takes the number in A and pide_efecto picks the voice: the lowest number wins. Numbers below 0x0F are one- or two-voice effects and from 0x0F up there is three-voice music. Each voice takes eleven bytes from 0xE010 and 0xE031 holds the copy of the PSG mixer, which start-up leaves at 0xB8. The tracks marked «in the table» are in the melody table (0x4DE0) but no routine asks for them with an ld a. Only one piece has been checked against openMSX, 0x98; the rest come out of the same engine but each has not been compared.
The tune at 0x4266 (0x98)
Asked for by L_4266; lasts 3.6 s.
Crossing the finish line (0x92)
Asked for by cruza_la_meta; lasts 5.8 s.
The tune at 0x4341 (0x95)
Asked for by L_4341; lasts 3.3 s.
Table track 0x90 (0x90)
Asked for by ninguna llamada directa: está en la tabla de pistas; lasts 20.6 s.
Table track 0x91 (0x91)
Asked for by ninguna llamada directa: está en la tabla de pistas; lasts 5.8 s.
Table track 0x93 (0x93)
Asked for by ninguna llamada directa: está en la tabla de pistas; lasts 5.8 s.
Table track 0x94 (0x94)
Asked for by ninguna llamada directa: está en la tabla de pistas; lasts 5.8 s.
Table track 0x96 (0x96)
Asked for by ninguna llamada directa: está en la tabla de pistas; lasts 3.6 s.
Table track 0x97 (0x97)
Asked for by ninguna llamada directa: está en la tabla de pistas; lasts 3.6 s.
Table track 0x99 (0x99)
Asked for by ninguna llamada directa: está en la tabla de pistas; lasts 3.6 s.
Table track 0x9A (0x9A)
Asked for by ninguna llamada directa: está en la tabla de pistas; lasts 2.3 s.