Pitch references for NTSC NES (A440?) for bits %-----PPP/%PPPPPPPP
of registers $4003/2, $4007/6, $400B/A, $400F/E
(remember to OR the high byte of the frequency with the Length Counter code)

;   // A1
A1 = $7F1
A#1 = $788
Bb1 = A#1
B1 = $70B
;   // C2
C2 = $6B8
C#2 = $654
Db2 = C#2
D2 = $5FB
D#2 = $599
Eb2 = D#2
E2 = $553
F2 = $505
F#2 = $4BF
Gf2 = F#2
Gn2 = $474
Gs2 = $433
Ab2 = Gs2
A2 = $3F8
A#2 = $3BB
Bb2 = A#2
B2 = $38C
;   // C3
C3 = $355
C#3 = $324
Db3 = C#3
D3 = $2F8
D#3 = $2CC
Eb3 = D#3
E3 = $2A5
F3 = $27E
F#3 = $25C
Gf3 = F#3
Gn3 = $23A
Gs3 = $219
Ab3 = Gs3
A3 = $1FB
A#3 = $1DF
Bb3 = A#3
B3 = $1C4
;   // C4
C4 = $1AA
C#4 = $193
Db4 = C#4
D4 = $17B
D#4 = $167
Eb4 = D#4
E4 = $153
F4 = $140
F#4 = $12D
Gf4 = F#4
Gn4 = $11C
Gs4 = $10D
Ab4 = Gs4
A4 = $0FD
A#4 = $0EF
Bb4 = A#4
B4 = $0E1
;   // C5
C5 = $0D5
C#5 = $0C9
Db5 = C#5
D5 = $0BE
D#5 = 179
Eb5 = D#5
E5 = $0A9
F5 = $09F
F#5 = $096
Gf5 = F#5
Gn5 = $08E
Gs5 = $086
Ab5 = Gs5
A5 = $07E
A#5 = $077
Bb5 = A#5
B5 = $070
;   // C6
C6 = $06A
C#6 = $064
Db6 = C#6
D6 = $05E
D#6 = $059
Eb6 = D#6
E6 = $054
F6 = $04F
F#6 = $04B
Gf6 = F#6
Gn6 = $046
Gs6 = $042
Ab6 = Gs6
A6 = $03F
A#6 = $03B
Bb6 = A#6
B6 = $038
;   // C7
C7 = $034
C#7 = $031
Db7 = C#7
D7 = $02F
D#7 = $02C
Eb7 = D#7
E7 = $029
F7 = $027
F#7 = $025
Gf7 = F#7
Gn7 = $023
Gs7 = $021
Ab7 = Gs7


 Length Counter reference for L value in bits %LLLLL--- of $4003/7/B/F
      |  0   1   2   3   4   5   6   7    8   9   A   B   C   D   E   F
 -----+----------------------------------------------------------------
 00-0F  10,254, 20,  2, 40,  4, 80,  6, 160,  8, 60, 10, 14, 12, 26, 14,
 10-1F  12, 16, 24, 18, 48, 20, 96, 22, 192, 24, 72, 26, 16, 28, 32, 30
 
 reformatted into useful lengths (at 120Hz?)
 length   | 002 004 006 008 010 012 014 016 018 020 022 024 026 028 030
 ---------+------------------------------------------------------------
 index    | $03 $05 $07 $09 $0B $0D $0F $11 $13 $15 $17 $19 $1B $1D $1F
 ---------+------------------------------------------------------------
 shifted  | $18 $28 $38 $48 $58 $68 $78 $88 $98 $A8 $B8 $C8 $D8 $E8 $F8

 length   | 010 020 040 080 160 060
 ---------+-------------------- ---
 index    | $00 $02 $04 $06 $08 $0A
 ---------+-------------------- ---
 shifted  | $00 $10 $20 $30 $40 $50

 length   | 012 024 048 096 192 072
 ---------+-------------------- ---
 index    | $10 $12 $14 $16 $18 $1A
 ---------+-------------------- ---
 shifted  | $80 $90 $A0 $B0 $C0 $D0

 length   | 014 016 026 032 254
 ---------+--------------------
 index    | $0C $1C $0E $1E $01
 ---------+--------------------
 shifted  | $60 $E0 $70 $F0 $08