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Make pitch_sweep pitch change argument consistent with the other signed magnitude arguments

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dannye 2019-08-25 09:57:50 -05:00
parent 8b0cd72a60
commit 44b9a240d4
46 changed files with 51 additions and 46 deletions
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7
macros/audio_macros.asm
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@ -32,11 +32,13 @@ ENDM
; arguments: length [0, 7], pitch change [-7, 7]
; length: length of time between pitch shifts
; sometimes used with a value >7 in which case the MSB is ignored
; pitch change: positive value means increase in pitch, negative value means decrease in pitch
; small magnitude means quick change, large magnitude means slow change
; in signed magnitude representation, so a value of 8 is the same as (negative) 0
pitch_sweep: MACRO
db $10
IF \2 <= 0
IF \2 < 0
db (\1 << 4) | (%1000 | (\2 * -1))
ELSE
db (\1 << 4) | \2
@ -46,6 +48,7 @@ ENDM
; arguments: length [0, 15], volume [0, 15], fade [-7, 7], frequency
; fade: positive value means decrease in volume, negative value means increase in volume
; small magnitude means quick change, large magnitude means slow change
; in signed magnitude representation, so a value of 8 is the same as (negative) 0
square_note: MACRO
db $20 | \1
IF \3 < 0
@ -59,6 +62,7 @@ ENDM
; arguments: length [0, 15], volume [0, 15], fade [-7, 7], frequency
; fade: positive value means decrease in volume, negative value means increase in volume
; small magnitude means quick change, large magnitude means slow change
; in signed magnitude representation, so a value of 8 is the same as (negative) 0
noise_note: MACRO
db $20 | \1
IF \3 < 0
@ -109,6 +113,7 @@ ENDM
; arguments: speed [0, 15], volume [0, 15], fade [-7, 7]
; fade: positive value means decrease in volume, negative value means increase in volume
; small magnitude means quick change, large magnitude means slow change
; in signed magnitude representation, so a value of 8 is the same as (negative) 0
note_type: MACRO
db $D0 | \1
IF \3 < 0