FF7/Field/Script/Opcodes/F2 AKAO

• Opcode: 0xF2
• Short name: AKAO
• Long name: Sound Operation (byte param1)

Memory layout

0xF2	B1 / B2	B3 / B4	0 / B6	Op	Param1	Param2	Param3	Param4	Param5

Arguments

• const Bit[4] B1: Bank to retrieve Param1, or zero if Param1 is specified as a literal value.
• const Bit[4] B2: Bank to retrieve Param2, or zero if Param2 is specified as a literal value.
• const Bit[4] B3: Bank to retrieve Param3, or zero if Param3 is specified as a literal value.
• const Bit[4] B4: Bank to retrieve Param4, or zero if Param4 is specified as a literal value.
• const Bit[4] 0: Zero.
• const Bit[4] B6: Bank to retrieve Param5, or zero if Param5 is specified as a literal value.
• const UByte Op: Operation to perform.
• const UByte Param1: Parameter 1.
• const UShort Param2: Parameter 2.
• const UShort Param3: Parameter 3.
• const UShort Param4: Parameter 4.
• const UShort Param5: Parameter 5.

Description

Perform an operation described by Op, and uses the parameters depending on the operation.

Operation list (by Aali and DLPB)

• 10 Play music [param1=Music ID]
• 14 Same as 10
• 15 Unknown Serves no significant function
• 18 Play music and resume from last position [param1=Music ID]
• 19 Same as 18

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• 20 Play one sound effect [param1=Panning, param2=Effect ID on channel #1]
• 21 Play two sound effects [param1=Panning, param2=Effect ID on channel #1, param3=Effect ID on channel #2]
• 22 Play three sound effects [param1=Panning, param2=Effect ID on channel #1, param3=Effect ID on channel #2, param4=Effect ID on channel #3]
• 23 Play four sound effects [param1=Panning, param2=Effect ID on channel #1, param3=Effect ID on channel #2, param4=Effect ID on channel #3, param5=Effect ID on channel #4]
• 24 Same as 20
• 25 Same as 21
• 26 Same as 22
• 27 Same as 23
• 28 Play a sound effect on channel #1 [param1=Panning, param2=Effect ID]
• 29 Play a sound effect on channel #2 [param1=Panning, param2=Effect ID]
• 2A Play a sound effect on channel #3 [param1=Panning, param2=Effect ID]
• 2B Play a sound effect on channel #4 [param1=Panning, param2=Effect ID]
• 30 Play a sound effect on channel #5, with centre panning

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• 98 Resumes music and sound effects
• 99 Pauses music and sound effects
• 9A Resumes only the music
• 9B Pauses only the music
• 9C Resumes only sound effects
• 9D Pauses only sound effects

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• A0 Volume control (channel #1) [param1=Volume]
• A1 Volume control (channel #2) [param1=Volume]
• A2 Volume control (channel #3) [param1=Volume]
• A3 Volume control (channel #4) [param1=Volume]
• A4 Volume transition (channel #1) [param1=Transition time, param2=Target volume]
• A5 Volume transition (channel #2) [param1=Transition time, param2=Target volume]
• A6 Volume transition (channel #3) [param1=Transition time, param2=Target volume]
• A7 Volume transition (channel #4) [param1=Transition time, param2=Target volume]
• A8 Pan control (channel #1) [param1=Panning]
• A9 Pan control (channel #2) [param1=Panning]
• AA Pan control (channel #3) [param1=Panning]
• AB Pan control (channel #4) [param1=Panning]
• AC Pan transition (channel #1) [param1=Transition time, param2=Target panning]
• AD Pan transition (channel #2) [param1=Transition time, param2=Target panning]
• AE Pan transition (channel #3) [param1=Transition time, param2=Target panning]
• AF Pan transition (channel #4) [param1=Transition time, param2=Target panning]

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• B0 Tempo control (channel #1) [param1=Tempo]
• B1 Tempo control (channel #2) [param1=Tempo]
• B2 Tempo control (channel #3) [param1=Tempo]
• B3 Tempo control (channel #4) [param1=Tempo]
• B4 Tempo transition (channel #1) [param1=Transition time, param2=Target tempo]
• B5 Tempo transition (channel #2) [param1=Transition time, param2=Target tempo]
• B6 Tempo transition (channel #3) [param1=Transition time, param2=Target tempo]
• B7 Tempo transition (channel #4) [param1=Transition time, param2=Target tempo]
• B8 Volume control for channel #1 to #4 [param1=Volume]
• B9 Volume transition for channel #1 to #4 [param1=Transition time, param2=Target volume]
• BA Pan control for channel #1 to #4 [param1=Panning]
• BB Pan transition for channel #1 to #4 [param1=Transition time, param2=Target panning]
• BC Tempo control for channel #1 to #4 [param1=Tempo]
• BD Tempo transition for channel #1 to #4 [param1=Transition time, param2=Target tempo]

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• C0 Music volume [param1=Volume]
• C1 Music volume transition [param1=Transition time, param2=Target volume]
• C2 Music From-To volume transition [param1=Transition time, param2=Starting volume, param3=Ending volume]

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• C8 Music balance [param1=balance]
• C9 Music balance transition [param1=Transition time, param2=Target balance]
• CA Music From-To balance transition [param1=Transition time, param2=Starting balance, param3=Ending balance]

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• D0 Music tempo [param1=Tempo]
• D1 Music tempo transition [param1=Transition time, param2=Target tempo]
• D2 Music From-To tempo transition [param1=Transition time, param2=Starting tempo, param3=Ending tempo]

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• E4 Reset music channel to default values (pan 0x40, volume 0x7f, tempo 0x00)

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• F0 Stop music
• F1 Stop sound effects (channel #1 to #4)

Please Note

Channel #5 is dedicated to the menu and should not be used for anything else.
All transitions use the formula Transition_time (in seconds) = param1 / 60.
The pan (audio L/R balance) values range from 0 to 127, where 0 is fully left, 64 is centre, and 127 is fully right.
The maximum game volume is 127.
The tempo value ranges from 0 to 64 (0x40). The normal tempo is 0.
Operations 0x10/14/18/19 do not work on the PSX game from field script.
Operations 0xC8/C9/CA are not implemented in the PC version.