Golden and Silver Leopard III Ver 169 bgm rip (high quality) Tempo imperfectly

bgm ripped by flama12333
Diferent Version.
Currently we need legit dump from pcb for emulation Since are mandatory.
Dumps are from Virtual Amusement Free-game Center - gamenet
I tried to test the dumps but same error due to preliminary marywu.cpp
I managed to extract all the music using a modified sound card rom that is capable of playing the music in the same format.
The pictures are not mine.

the info are unknown. There are pcb pictures but look bad quality
the following are
mcu: at89c52?
Clock: unknown
Rom:
unknown
Size:64KB? has program rom code
sound chip info
UM3567 - YM2413 OPLL Clone
Clock: 3.579545 MHz - same goes to guan shing
AY-3-8910A PSG
Clock: 3,579545 MHz - same goes to guan shing
Music Author: Sunkiss chen

bgm under wip. there are something imperfection like sound tempo
and what 1 FF Bytes does in last format song bytes?

real hardware for reference
   • 鑫誠電子-小瑪莉,神秘列車-大型電玩-瑪莉台