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a1=440 Hzに基づく12平均律音階(Hz)

C2
C1
C
c
c1
c2
c3
c4
c5
C
16.352
32.703
65.406
130.81
261.63
523.25
1046.5
2093.0
4186.0
Cis/Des
17.324
34.648
69.296
138.59
277.18
554.37
1108.7
2217.5
4434.9
D
18.354
36.708
73.416
146.83
293.66
587.33
1174.7
2349.3
4698.6
Dis/Es
19.445
38.891
77.782
155.56
311.13
622.25
1244.5
2489.0
4978.0
E
20.602
41.203
82.407
164.81
329.63
659.26
1318.5
2637.0
5274.0
F
21.827
43.654
87.307
174.61
349.23
698.46
1396.9
2793.8
5587.7
Fis/Ges
23.125
46.249
92.499
185.00
369.99
739.99
1480.0
2960.0
5919.9
G
24.500
48.999
97.999
196.00
392.00
783.99
1568.0
3136.0
6271.9
Gis/As
25.957
51.913
103.83
207.65
415.30
830.61
1661.2
3322.4
6644.9
A
27.500
55.000
110.00
220.00
440.00
880.00
1760.0
3520.0
7040.0
B
29.135
58.270
116.54
233.08
466.16
932.33
1864.7
3729.3
7458.6
H
30.868
61.735
123.47
246.94
493.88
987.77
1975.5
3951.1
7902.1

a1=442 Hzに基づく12平均律音階(Hz)

C2
C1
C
c
c1
c2
c3
c4
c5
C
16.426
32.852
65.704
131.41
262.81
525.63
1051.3
2102.5
4205.0
Cis/Des
17.403
34.805
69.611
139.22
278.44
556.89
1113.8
2227.5
4455.1
D
18.437
36.875
73.750
147.50
295.00
590.00
1180.0
2360.0
4720.0
Dis/Es
19.534
39.068
78.135
156.27
312.54
625.08
1250.2
2500.3
5000.7
E
20.695
41.391
82.781
165.56
331.13
662.25
1324.5
2649.0
5298.0
F
21.926
43.852
87.704
175.41
350.82
701.63
1403.3
2806.5
5613.1
Fis/Ges
23.230
46.460
92.919
185.84
371.68
743.35
1486.7
2973.4
5946.8
G
24.611
49.222
98.444
196.89
393.78
787.55
1575.1
3150.2
6300.4
Gis/As
26.075
52.149
104.30
208.60
417.19
834.38
1668.8
3337.5
6675.1
A
27.625
55.250
110.50
221.00
442.00
884.00
1768.0
3536.0
7072.0
B
29.268
58.535
117.07
234.14
468.28
936.57
1873.1
3746.3
7492.5
H
31.008
62.016
124.03
248.06
496.13
992.26
1984.5
3969.0
7938.1

平均律音階の計算の仕方: f=a1×2(n/12)
f:各音の周波数、a1:基準音a1の周波数、n:下のテーブルに示す各音のa1からの距離

C2
C1
C
c
c1
c2
c3
c4
c5
C
-57
-45
-33
-21
-8
4
16
28
40
Cis/Des
-56
-44
-32
-20
-7
5
17
29
41
D
-55
-43
-31
-19
-6
6
18
30
42
Dis/Es
-54
-42
-30
-18
-5
7
19
31
43
E
-53
-41
-29
-17
-4
8
20
32
44
F
-52
-40
-28
-16
-3
9
21
33
45
Fis/Ges
-51
-39
-27
-15
-2
10
22
34
46
G
-50
-38
-26
-14
-1
11
23
35
47
Gis/As
-49
-37
-25
-12
0
12
24
36
48
A
-48
-36
-24
-11
1
13
25
37
49
B
-47
-35
-23
-10
2
14
26
38
50
H
-46
-34
-22
-9
3
15
27
39
51

a1=442 Hz のとき純正律と平均律の C-Durの比較

純正律 平均律
c1
265.20
1.00000
1
262.81
1.000000 1=20
d1
298.35
1.12500
9/8
295.00
1.122462 22/12
e1
331.50
1.25000
5/4
331.13
1.259921 24/12
f1
353.60
1.33333
4/3
350.82
1.334840 25/12
g1
397.80
1.50000
3/2
393.78
1.498307 27/12
a1
442.00
1.66667
5/3
442.00
1.681793 29/12
h1
497.25
1.87500
15/8
496.13
1.887749 211/12
c2
530.40
2.00000
2
525.63
2.000000 2=21

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