Sound Hacking/WonderSwan

Simple Triggers

Advanced Hacks

Digital Monster: D-Project

offset  hex patch               description
328B75  B0 01 -> B0 xx          ;Replace Title Music
328C69  75 03 -> EB 03          ;Stay at Title screen

Valid Music IDs: 00~15

Final Fantasy IV

offset  hex patch               description
3400EF  B8 9C 00 -> B8 xx 00    ;Replace Title Music

Valid Music IDs: 60, 97~CE

Ouchan no Oekaki Logic

offset  hex patch               description
007196  E8 16 EF -> E8 E7 EE    ; no music on title screen
007402  B6 15    -> C3 90       ; prevent sound effect when pressing START
008C03  B6 07    -> B6 xx       ; replace menu music

Valid Music IDs: 00~0B

Notes:

CALL 86080h = stop music
CALL 860AFh = play music, ID is in register DH
CALL 8000h:0CA1Fh = play music/sound effect/voice, ID is in register DH, 00~13 = music, 14~22 = SFX, 23~2A = voice