SCHG:Sonic the Hedgehog 3 & Knuckles/Music Editing

SCHG: Sonic the Hedgehog 3 & Knuckles
Main Article
Art Editing
Editing Art Uncompressed Art Nemesis Format Art Kosinski Format Art Palette Editing Palette Locations Pattern Load Requests
Object Editing
Editing Objects Object Pointers Object Pointer List #1 Object Pointer List #2 Objects not in either list Sprite Mappings Dynamic PLCs
Level Editing
Editing Levels Object Placement Ring Placement Level Layout 16x16 Block Mappings 128x128 Block Mappings
Music Editing
Editing Music Pointer Format Header Format DAC Samples Universal Voice Bank Music Pointers (Sonic & Knuckles) Music Pointers (Sonic 3)
RAM Editing
Editing RAM Main System Memory Locations Object Status Table Format
Sonic & Knuckles Collection
Sonic & Knuckles Collection Music and sound effects

For general information on SMPS, see Sega Retro.

Music locations

Sonic 3

• Music Pointers (These add to $C8000): $E761A
• Music Pointers (These add to $D0000): $E762E
• Music Pointers (These add to $D8000): $E7652
• Music Pointers (These add to $C0000): $E7674
• Sound Effect Pointers (These add to $F8000): $E767E

Sonic & Knuckles

• Music Pointers: $F793E

Music ID	Music pointer	Song name
These add to 2C8000:
01	8000	AIZ1
02	9B6D	AIZ2
03	B0BC	HZ1
04	C0C6	HZ2
05	D364	MGZ1
06	D97B	MGZ2
07	E48F	CNZ1
08	DDA9	CNZ2
These add to E8000:
09	8000	FBZ1
0A	8597	FBZ2
0F	8AFE	MHZ1 NOTE: This one is a bit tricky... The FE is right before the FF. Make sure to skip the FF or the driver will crash.
10	9106	MHZ2
11	9688	SZ1
12	9CF2	SZ2
13	A2E5	LRZ1
14	ACF3	LRZ2
15	BE80	SSZ
16	C2B4	DEZ1
17	C79F	DEZ2
18	CBB1	Act 1 Boss
19	CEE1	Act 2 Boss
1A	D3DD	Doomsday
1B	DCC0	Rolling Jump Bonus Stage
1C	E223	Special Stage
1D	EABB	Slot Machine Bonus Stage
1F	F5A3	Knuckles' Theme
25	F88E	Title
2A	FD4B	1UP
2B	FE75	Chaos Emerald
2E	CBB1	Act 1 Boss (same as 18)
These add to 2D0000:
0B	86AA	ICZ1
0C	8000	ICZ2
0D	9345	LBZ1
0E	8DC8	LBZ2
1E	8AE8	Gum Ball Machine Bonus Stage
20	99F7	Azure Lake
21	A4FD	Balloon Park
22	B0EC	Desert Palace
23	C324	Chrome Gadget
24	DA47	Endless Mine
26	E587	S3 credits
2D	F5E4	Competition Menu
31	FABE	S3 countdown
These add to E0000:
27	DD4B	Game/Time Over
28	DFA6	Continue
29	E3C0	Bonus Screen
2C	E574	Invincible
2F	E7AF	Menu
1F	F74C	Knuckles' Theme
32	FCDE	S&K outro
DC	C104	S&K credits

• Sound Effect Pointers (These add to $F8000): $F79AD
  • Specifics...

Sound Test ID	Pointer Value
$33	DE30
$34	DE5E
$35	DE6F
$36	DEA1
$37	DEC5
$38	DEF4
$39	DF2A
$3A	DF6B
$3B	DF96
$3C	DFE5
$3D	E023
$3E	E05D
$3F	E088
$40	E0AB
$41	E0CE
$42	E0F1
$43	E109
$44	E122
$45	E14F
$46	E177
$47	E1A4
$48	E1C4
$49	E1DE
$4A	E206
$4B	E22E
$4C	E278
$4D	E2A2
$4E	E2CF
$4F	E313
$50	E322
$51	E35A
$52	E38B
$53	E3A8
$54	E3E8
$55	E42B
$56	E453
$57	E463
$58	E481
$59	E49A
$5A	E4F6
$5B	E523
$5C	E530
$5D	E558
$5E	E581
$5F	E5B2
$60	E5DA
$61	E61B
$62	E64C
$63	E662
$64	E68C
$65	E6AB
$66	E6E1
$67	E730
$68	E75C
$69	E7B0
$6A	E7DD
$6B	E811
$6C	E823
$6D	E833
$6E	E852
$6F	E886
$70	E896
$71	E8E0
$72	E8EA
$73	E917
$74	E94B
$75	E978
$76	E9A7
$77	E9D1
$78	EA1B
$79	EA48
$7A	EA93
$7B	EAC7
$7C	EAF7
$7D	EB28
$7E	EB55
$7F	EB6D
$80	EB8B
$81	EBBA
$82	EC05
$83	EC32
$84	EC7E
$85	ECAB
$86	ECD8
$87	ED05
$88	ED3B
$89	ED68
$8A	ED75
$8B	EDA9
$8C	EDDF
$8D	EE10
$8E	EE2A
$8F	EE5B
$90	EE91
$91	EEC3
$92	EEF9
$93	EF2D
$94	EF77
$95	EFA6
$96	EFD5
$97	F009
$98	F01C
$99	F068
$9A	F090
$9B	F0AF
$9C	F114
$9D	F14B
$9E	F17F
$9F	F1C0
$A0	F1FC
$A1	F214
$A2	F23C
$A3	F274
$A4	F2A1
$A5	F2CE
$A6	F2FB
$A7	F313
$A8	F33B
$A9	F365
$AA	F38F
$AB	F3EA
$AC	F42A
$AD	F49C
$AE	F4AB
$AF	F4DA
$B0	F507
$B1	F582
$B2	F5D7
$B3	F603
$B4	F67D
$B5	F6AA
$B6	F6D2
$B7	F713
$B8	F745
$B9	F76C
$BA	F794
$BB	F7BE
$BC	F7CE
$BD	F7F9
$BE	F837
$BF	F86A
$C0	F89C
$C1	F8D1
$C2	F907
$C3	F91E
$C4	F94E
$C5	F97E
$C6	F9B7
$C7	F9F2
$C8	FA21
$C9	FA2B
$CA	FA66
$CB	FA9C
$CC	FAD7
$CD	FB12
$CE	FB45
$CF	FB60
$D0	FB6A
$D1	FBA1
$D2	FBBE
$D3	FBF4
$D4	FC2D
$D5	FC64
$D6	FC9D
$D7	FCCE
$D8	FCFF
$D9	FD32
$DA	FD62
$DB	FD94
$DC	FD94
$DD	FD94
$DE	FD94
$DF	FD94

DAC Samples

• DAC $81-$9A Pointer Index (Adds to $E0000): $E0000
• DAC $9B-$AA Pointer Index (Adds to $E8000): $E8000
• DAC $AB-$C0 Pointer Index (Adds to $F0000): $F0000

These pointer indexes work by pointing to the sample setup data for the particular samples. You'll notice there are 3 pointer indexes - this is since not all the samples can fit in a single bank, so they span 3 banks. The pointers are repeated at all 3 indexes, but only the defined samples for the index (listed above) will be in the relevant ROM bank.

The format for a DAC sample entry is pretty simple. Follow along:

Offset	Size	Function
$00	Byte	Sample rate/pitch. The lower the value, the faster the sample will play.
$01-$02	Word	Size of the DAC sample, in bytes. NOTE: Value is little endian, so remember to swap the bytes to get the real value.
$03-$04	Word	Pointer to the DAC sample, within the current bank. NOTE: Value is little endian, so remember to swap the bytes to get the real value.

The DAC sample definitions within songs:

Value	Sample
$81	Snare
$82	High-Tom
$83	Mid-Tom
$84	Low-Tom
$85	Floor Tom
$86	Kick
$87	Muffled Snare
$88	Crash Cymbal
$89	Ride Cymbal(?)
$8A	Low Metal Hit
$8B	Metal Hit
$8C	High Metal Hit
$8D	Higher Metal Hit
$8F	Clap
$90	Electric High-Tom
$91	Electric Mid-Tom
$92	Electric Low-Tom
$93	Electric Floor Tom
$94	Tight Snare
$95	Mid-pitch Snare
$96	Loose Snare
$97	Looser Snare
$98	Hi-Timpani
$99	Low-Timpani
$9A	Mid-Timpani
$9B	Quick Loose Snare
$9C	Click
$9D	Power Kick
$9E	Quick Glass Crash
$9F	Glass Crash with Snare
$A0	Glass Crash
$A1	Glass Crash with Kick
$A2	Quiet Glass Crash
$A3	Odd Snare with Kick
$A4	Kick with extra bass
$A5	"Come on!"
$A6	Dance Snare
$A7	Loose Kick
$A8	Moderately Loose Kick
$A9	"Woo!"
$AA	"Go!"
$AB	Snare with voice going "Go!"
$AC	Power Tom
$AD	Hi-Wood Block
$AE	Low-Wood Block
$AF	Hi-Hit Drum
$B0	Low-Hit Drum
$B1	Metal Crash Hit
$B2	Echoed Clap Hit
$B3	Lower Echoed Clap Hit
$B4	Hip-Hop style hit with a kick
$B5	Hip-Hop style hit with a Power Kick
$B6	Some Bass with a voice going "Hey!"
$B7	Dance Style Kick
$B8	Hip-Hop hit with a kick
$B9	Hip-Hop hit with a kick
$BA	Reverse Fading Wind Sound
$BB	Scratch
$BC	Loose Snare with noise
$BD	Power Kick
$BE	Crashing noise with voice going "Woo!"
$BF	Quick Hit
$C0	Kick with a voice going "Hey!"
$C1	Power Kick with hit
$C2	Low Power Kick with hit
$C3	Lower Power Kick with hit
$C4	Lowest Power Kick with hit

Universal Voice Bank

In Sonic 3, some songs have the value "$D817" as their voice pointer (which maps to Z80 RAM location $17D5). When a song has this in its voice pointer, that means it's being prepped to use a global set of multiple voices that any song in the game can use. This is generally used to save space for songs that use the same voices. Interestingly enough, though, the Special Stage music has the first 5 voices used in the Universal Voice Bank, and all in the same order, so it's puzzling why they didn't just have the song use the bank (as it's fully capable of doing so).

• Universal Voice Bank in Sonic 3: $E77D8

Universal Voice Bank definitions

Using the Universal Voice Bank is akin to using voices in a normal song - each voice has a value, defined by coordination flag $EF. Here are some of the voices used in the Universal Voice Bank.

Value	Description
$00	Synth Bass 2
$01	Trumpet 1
$02	Slap Bass 2
$03	Synth Bass 1
$04	Bell Synth 1
$05	Bell Synth 2
$06	Synth Brass 1
$07	Synth like Bassoon
$08	Bell Horn type thing
$09	Synth Bass 3
$0A	Synth Trumpet
$0B	Wood Block
$0C	Tubular Bell
$0D	Strike Bass
$0E	Elec Piano
$0F	Bright Piano
$10	Church Bell
$11	Synth Brass 2
$12	Bell Piano
$13	Wet Wood Bass
$14	Silent Bass
$15	Picked Bass
$16	Xylophone
$17	Sine Flute
$18	Pipe Organ
$19	Synth Brass 2
$1A	Harpischord
$1B	Metallic Bass
$1C	Alternate Metallic Bass
$1D	Backdropped Metallic Bass
$1E	Sine like Bell
$1F	Synth like Metallic with Small Bell.
$20	Nice Synth like lead.
$21	Rock Organ
$22	Strike like Slap Bass

Real-Time Music editing

Offset	Z80 RAM Location	Purpose
$001A8C	1618	Music Pointers (Sonic & Knuckles)
$001A8E	161A	Music Pointers (Sonic 3)
$001778	1304	Pointer for Music Pointers
$000FD9	0B65	Music Bank IDs (Sonic & Knuckles)
$000FBC	0B48	Music Bank IDs (Sonic 3)
$00177A	1306	Pointer for Sound Effect Pointers
$001AF2	167E	Sound Effect Pointers