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--- base:pal_frequency_table [2015-04-17 04:33] – created - external edit 127.0.0.1
+++ base:pal_frequency_table [2023-07-18 22:18] (current) – acrouzet
@@ Line 1: / Line 1: @@
-====== PAL frequency table ======
+====== PAL A440 frequency table ======
+Note: This table does not correspond to A440 tuning on the PAL-N "Drean" C64 models, which have a slightly faster clock.
 <code>
 FreqTablePalLo:
 	        ;      C   C#  D   D#  E   F   F#  G   G#  A   A#  B
-                .byte $17,$27,$39,$4b,$5f,$74,$8a,$a1,$ba,$d4,$f0,$0e  ; 1
+                .byte $16,$27,$39,$4b,$5f,$74,$8a,$a1,$ba,$d4,$f0,$0e  ; 0
-                .byte $2d,$4e,$71,$96,$be,$e8,$14,$43,$74,$a9,$e1,$1c  ; 2
+                .byte $2d,$4e,$71,$96,$be,$e7,$14,$42,$74,$a9,$e0,$1b  ; 1
-                .byte $5a,$9c,$e2,$2d,$7c,$cf,$28,$85,$e8,$52,$c1,$37  ; 3
+                .byte $5a,$9c,$e2,$2d,$7b,$cf,$27,$85,$e8,$51,$c1,$37  ; 2
-                .byte $b4,$39,$c5,$5a,$f7,$9e,$4f,$0a,$d1,$a3,$82,$6e  ; 4
+                .byte $b4,$38,$c4,$59,$f7,$9d,$4e,$0a,$d0,$a2,$81,$6d  ; 3
-                .byte $68,$71,$8a,$b3,$ee,$3c,$9e,$15,$a2,$46,$04,$dc  ; 5
+                .byte $67,$70,$89,$b2,$ed,$3b,$9c,$13,$a0,$45,$02,$da  ; 4
-                .byte $d0,$e2,$14,$67,$dd,$79,$3c,$29,$44,$8d,$08,$b8  ; 6
+                .byte $ce,$e0,$11,$64,$da,$76,$39,$26,$40,$89,$04,$b4  ; 5
-                .byte $a1,$c5,$28,$cd,$ba,$f1,$78,$53,$87,$1a,$10,$71  ; 7
+                .byte $9c,$c0,$23,$c8,$b4,$eb,$72,$4c,$80,$12,$08,$68  ; 6
-                .byte $42,$89,$4f,$9b,$74,$e2,$f0,$a6,$0e,$33,$20,$ff  ; 8
+                .byte $39,$80,$45,$90,$68,$d6,$e3,$99,$00,$24,$10,$ff  ; 7
 FreqTablePalHi:
 		;      C   C#  D   D#  E   F   F#  G   G#  A   A#  B
-                .byte $01,$01,$01,$01,$01,$01,$01,$01,$01,$01,$01,$02  ; 1
+                .byte $01,$01,$01,$01,$01,$01,$01,$01,$01,$01,$01,$02  ; 0
-                .byte $02,$02,$02,$02,$02,$02,$03,$03,$03,$03,$03,$04  ; 2
+                .byte $02,$02,$02,$02,$02,$02,$03,$03,$03,$03,$03,$04  ; 1
-                .byte $04,$04,$04,$05,$05,$05,$06,$06,$06,$07,$07,$08  ; 3
+                .byte $04,$04,$04,$05,$05,$05,$06,$06,$06,$07,$07,$08  ; 2
-                .byte $08,$09,$09,$0a,$0a,$0b,$0c,$0d,$0d,$0e,$0f,$10  ; 4
+                .byte $08,$09,$09,$0a,$0a,$0b,$0c,$0d,$0d,$0e,$0f,$10  ; 3
-                .byte $11,$12,$13,$14,$15,$17,$18,$1a,$1b,$1d,$1f,$20  ; 5
+                .byte $11,$12,$13,$14,$15,$17,$18,$1a,$1b,$1d,$1f,$20  ; 4
-                .byte $22,$24,$27,$29,$2b,$2e,$31,$34,$37,$3a,$3e,$41  ; 6
+                .byte $22,$24,$27,$29,$2b,$2e,$31,$34,$37,$3a,$3e,$41  ; 5
-                .byte $45,$49,$4e,$52,$57,$5c,$62,$68,$6e,$75,$7c,$83  ; 7
+                .byte $45,$49,$4e,$52,$57,$5c,$62,$68,$6e,$75,$7c,$83  ; 6
-                .byte $8b,$93,$9c,$a5,$af,$b9,$c4,$d0,$dd,$ea,$f8,$ff  ; 8
+                .byte $8b,$93,$9c,$a5,$af,$b9,$c4,$d0,$dd,$ea,$f8,$ff  ; 7
 </code>