ref: 710c3275fc6a4caeeff3ad89c029a05984cf8388
dir: /constants/audio_constants.asm/
; HW sound channel register base addresses HW_CH1_BASE EQU (rNR10 % $100) HW_CH2_BASE EQU ((rNR21 % $100) - 1) HW_CH3_BASE EQU (rNR30 % $100) HW_CH4_BASE EQU ((rNR41 % $100) - 1) ; HW sound channel enable bit masks HW_CH1_ENABLE_MASK EQU %00010001 HW_CH2_ENABLE_MASK EQU %00100010 HW_CH3_ENABLE_MASK EQU %01000100 HW_CH4_ENABLE_MASK EQU %10001000 ; HW sound channel disable bit masks HW_CH1_DISABLE_MASK EQU (~HW_CH1_ENABLE_MASK & $ff) HW_CH2_DISABLE_MASK EQU (~HW_CH2_ENABLE_MASK & $ff) HW_CH3_DISABLE_MASK EQU (~HW_CH3_ENABLE_MASK & $ff) HW_CH4_DISABLE_MASK EQU (~HW_CH4_ENABLE_MASK & $ff) REG_DUTY_SOUND_LEN EQU 1 REG_VOLUME_ENVELOPE EQU 2 REG_FREQUENCY_LO EQU 3 MAX_SFX_ID_1 EQUS "SFX_SAFARI_ZONE_PA" MAX_SFX_ID_2 EQUS "SFX_SILPH_SCOPE" MAX_SFX_ID_3 EQUS "SFX_SHOOTING_STAR" NOISE_INSTRUMENTS_START EQUS "SFX_NOISE_INSTRUMENT01" NOISE_INSTRUMENTS_END EQUS "SFX_NOISE_INSTRUMENT19 + 1" CRY_SFX_START EQUS "SFX_CRY_00" CRY_SFX_END EQUS "SFX_CRY_25 + 3" BATTLE_SFX_START EQUS "SFX_PECK" BATTLE_SFX_END EQUS "SFX_SILPH_SCOPE + 1" ; wChannelFlags1 constants BIT_PERFECT_PITCH EQU 0 ; controlled by toggle_perfect_pitch command BIT_SOUND_CALL EQU 1 ; if in sound call BIT_NOISE_OR_SFX EQU 2 ; if channel is the music noise channel or an SFX channel BIT_VIBRATO_DIRECTION EQU 3 ; if the pitch is above or below normal (cycles) BIT_PITCH_SLIDE_ON EQU 4 ; if pitch slide is active BIT_PITCH_SLIDE_DECREASING EQU 5 ; if the pitch slide frequency is decreasing (instead of increasing) BIT_ROTATE_DUTY_CYCLE EQU 6 ; if rotating duty cycle ; wChannelFlags2 constant (only has one flag) BIT_EXECUTE_MUSIC EQU 0 ; if in execute music