Everything you hear here comes from running the cartridge's own sound engine (un_cuadro_de_sonido, 0x7C5C, and pon_la_melodia, 0x7BCC, which hands it the channels; 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.
pon_la_melodia takes the number in A, without looking at priority. Low numbers are effects and from 0x88 up there is music. Each channel takes twelve bytes from 0xE018 and 0xE03C holds the copy of the PSG mixer, which start-up leaves at 0xB8. The tracks marked «in the table» are in the track table but no routine asks for them with an ld a. Only one piece has been checked against openMSX, 0x88; the rest come out of the same engine but each has not been compared.
The fight tune (0x88)
Asked for by escena_3_arranca_la_musica, escena_4_el_combate, premio y apunta_el_enemigo; lasts 29.9 s and starts again at second 0.0.
The end of the game (0x8F)
Asked for by se_acabo_la_partida; lasts 2.9 s.
The fall (0x8A)
Asked for by modo_3_la_caida_si_no_2; lasts 3.0 s.
Table track 0x89 (0x89)
Asked for by ninguna llamada directa: está en la tabla de pistas; lasts 32.8 s and starts again at second 2.9.
Table track 0x8B (0x8B)
Asked for by ninguna llamada directa: está en la tabla de pistas; lasts 34.2 s.
Table track 0x8D (0x8D)
Asked for by ninguna llamada directa: está en la tabla de pistas; lasts 2.9 s.
Table track 0x8E (0x8E)
Asked for by ninguna llamada directa: está en la tabla de pistas; lasts 2.9 s.
Table track 0x90 (0x90)
Asked for by ninguna llamada directa: está en la tabla de pistas; lasts 2.9 s.
Table track 0x91 (0x91)
Asked for by ninguna llamada directa: está en la tabla de pistas; lasts 2.9 s.