Random battle theme

Ok, so this would open a HUGE can of worms for me in my music choices, but is there any way there can be two tables: one for the WOR, and one for the WOB with the same backgrounds?

I think this code will work for that:

Code:

hirom
header

org $C2BDB7
JSR free_space
NOP

org $C264C9          ; change to free space
free_space:
TDC
LDA $C2BF3B,X        ; load formation song
CMP #$24             ; check if battle song
BNE exit             ; branch if not
LDA $11E2            ; load battle background byte
AND #$3F             ; isolate battle background
REP #$20
TAX                  ; set BG as index
SEP #$20
LDA $7E1E94          ; Load event byte containing the WOR event bit (1E94:4))
AND #$10            
BNE wor              ; branch if WoR
LDA table_wob,X      ; load WoB BG song ID
BRA exit
wor:
LDA table_wor,X      ; load WoR BG song ID
exit:
RTS

; your $37 song IDs
; this table can be anywhere in the ROM:
org $F15550 ;(change this to move table elsewhere)
table_wob:
db $56    ; W O B Grass
db $57    ; WOR Forest
db $66    ; W O B Desert
db $5B    ; W O B Forest
db $6A    ; Building
db $6E    ; WOR Grass
db $24    ; The Veldt
db $24    ; Falling through clouds
db $24    ; Narshe Exterior
db $24    ; Narshe Cave with Mine Tracks
db $6D    ; Common Brown Cave
db $61    ; Mountain Outside
db $61    ; Mountain Cave
db $5C    ; Raft on River
db $24    ; Imperial Base
db $74    ; On top of train car
db $74    ; inside train car
db $6D    ; Blue Narshe Secret Entrance Cave and Umaro Cave
db $71    ; Icy Field
db $24    ; Bright Town
db $58    ; Vector Inside / Kefkas Tower Interior
db $62    ; Floating Continent
db $59    ; Kefka's Tower Exterior
db $24    ; Opera Stage
db $24    ; Opera House Rafters
db $5F    ; Flaming House
db $77    ; Ancient Castle interior and Figaro Castle basement
db $64    ; Magitek Research (Testing Tubes)
db $6B    ; Colosseum
db $72    ; Magitek Facility
db $24    ; Village
db $5F    ; Waterfall
db $24    ; Owzer's House
db $24    ; Running on Train Tracks
db $24    ; Bridge near Sealed Gate
db $24    ; Underwater
db $6A    ; Zozo
db $24    ; Airship, WOB, Centered
db $76    ; Tomb
db $77    ; Ancient Castle Exterior Ruins and Doma Castle
db $59    ; Kefka's Tower
db $24    ; Airship WOR Right
db $6C    ; Red Lava Cave
db $24    ; Light Building
db $24    ; Magitek Cart Ride
db $24    ; Fanatic's Tower
db $64    ; Cyan's Dream World
db $55    ; WOR Desert
db $24    ; Airship, Wob, Right
db $24    ; Unused
db $24    ; Unused
db $24    ; Statue 1 (Doom)
db $24    ; Statue 2 (Poltergeist)
db $24    ; Statue 3 (Goddess Minerva)
db $24    ; Kefka's Background
db $24    ; Tentacles

; WoR table
table_wor:
db $56    ; W O B Grass
db $57    ; WOR Forest
db $66    ; W O B Desert
db $5B    ; W O B Forest
db $6A    ; Building
db $6E    ; WOR Grass
db $24    ; The Veldt
db $24    ; Falling through clouds
db $24    ; Narshe Exterior
db $24    ; Narshe Cave with Mine Tracks
db $6D    ; Common Brown Cave
db $61    ; Mountain Outside
db $61    ; Mountain Cave
db $5C    ; Raft on River
db $24    ; Imperial Base
db $74    ; On top of train car
db $74    ; inside train car
db $6D    ; Blue Narshe Secret Entrance Cave and Umaro Cave
db $71    ; Icy Field
db $24    ; Bright Town
db $58    ; Vector Inside / Kefkas Tower Interior
db $62    ; Floating Continent
db $59    ; Kefka's Tower Exterior
db $24    ; Opera Stage
db $24    ; Opera House Rafters
db $5F    ; Flaming House
db $77    ; Ancient Castle interior and Figaro Castle basement
db $64    ; Magitek Research (Testing Tubes)
db $6B    ; Colosseum
db $72    ; Magitek Facility
db $24    ; Village
db $5F    ; Waterfall
db $24    ; Owzer's House
db $24    ; Running on Train Tracks
db $24    ; Bridge near Sealed Gate
db $24    ; Underwater
db $6A    ; Zozo
db $24    ; Airship, WOB, Centered
db $76    ; Tomb
db $77    ; Ancient Castle Exterior Ruins and Doma Castle
db $59    ; Kefka's Tower
db $24    ; Airship WOR Right
db $6C    ; Red Lava Cave
db $24    ; Light Building
db $24    ; Magitek Cart Ride
db $24    ; Fanatic's Tower
db $64    ; Cyan's Dream World
db $55    ; WOR Desert
db $24    ; Airship, Wob, Right
db $24    ; Unused
db $24    ; Unused
db $24    ; Statue 1 (Doom)
db $24    ; Statue 2 (Poltergeist)
db $24    ; Statue 3 (Goddess Minerva)
db $24    ; Kefka's Background
db $24    ; Tentacles