| 唱名 | 鍵號 | 音名 | 音名(以A0編址) | 頻率(Hz) | 音組 |
| 1Do | 大字二組 | ||||
| 2#Do | |||||
| 3Re | |||||
| 4#Re | |||||
| 5Mi | |||||
| 6Fa | |||||
| 7#Fa | |||||
| 8Sol | |||||
| 9#Sol | |||||
| 10La | 1 | A2 | A0 | 27.5 | |
| 11#La | 2 | #A2 | #A0 | 29.1 | |
| 12Si | 3 | B2 | B0 | 30.9 | |
| 1Do | 4 | C1 | C1 | 32.7 | 大字一組 |
| 2#Do | 5 | #C1 | #C1 | 34.6 | |
| 3Re | 6 | D1 | D1 | 36.7 | |
| 4#Re | 7 | #D1 | #D1 | 38.9 | |
| 5Mi | 8 | E1 | E1 | 41.2 | |
| 6Fa | 9 | F1 | F1 | 43.6 | |
| 7#Fa | 10 | #F1 | #F1 | 46.2 | |
| 8Sol | 11 | G1 | G1 | 49.0 | |
| 9#Sol | 12 | #G1 | #G1 | 51.9 | |
| 10La | 13 | A1 | A1 | 55.0 | |
| 11#La | 14 | #A1 | #A1 | 58.2 | |
| 12Si | 15 | B1 | B1 | 61.7 | |
| 1Do | 16 | C | C2 | 65.4 | 大字組 |
| 2#Do | 17 | #C | #C2 | 69.2 | |
| 3Re | 18 | D | D2 | 73.2 | |
| 4#Re | 19 | #D | #D2 | 77.8 | |
| 5Mi | 20 | E | E2 | 82.4 | |
| 6Fa | 21 | F | F2 | 87.3 | |
| 7#Fa | 22 | #F | #F2 | 92.4 | |
| 8Sol | 23 | G | G2 | 98 | |
| 9#Sol | 24 | #G | #G2 | 103.8 | |
| 10La | 25 | A | A2 | 110.0 | |
| 11#La | 26 | #A | #A2 | 116.5 | |
| 12Si | 27 | B | B2 | 123.4 | |
| 1Do | 28 | c | C3 | 130.8 | 小字組 |
| 2#Do | 29 | #c | #C3 | 138.5 | |
| 3Re | 30 | d | D3 | 146.8 | |
| 4#Re | 31 | #d | #D3 | 155.6 | |
| 5Mi | 32 | e | E3 | 164.8 | |
| 6Fa | 33 | f | F3 | 174.6 | |
| 7#Fa | 34 | #f | #F3 | 184.9 | |
| 8Sol | 35 | g | G3 | 196.0 | |
| 9#Sol | 36 | #g | #G3 | 207.6 | |
| 10La | 37 | a | A3 | 220.0 | |
| 11#La | 38 | #a | #A3 | 233.0 | |
| 12Si | 39 | b | B3 | 247.1 | |
| 1Do | 40 | c1 | C4 | 261.6 | 小字一組 |
| 2#Do | 41 | #c1 | #C4 | 277.0 | |
| 3Re | 42 | d1 | D4 | 293.6 | |
| 4#Re | 43 | #d1 | #D4 | 311.1 | |
| 5Mi | 44 | e1 | E4 | 329.6 | |
| 6Fa | 45 | f1 | F4 | 349.2 | |
| 7#Fa | 46 | #f1 | #F4 | 369.9 | |
| 8Sol | 47 | g1 | G4 | 391.9 | |
| 9#Sol | 48 | #g1 | #G4 | 415.3 | |
| 10La | 49 | a1 | A4 | 440.0 | |
| 11#La | 50 | #a1 | #A4 | 466.0 | |
| 12Si | 51 | b1 | B4 | 493.8 | |
| 1Do | 52 | c2 | C5 | 523.2 | 小字二組 |
| 2#Do | 53 | #c2 | #C5 | 554.3 | |
| 3Re | 54 | d2 | D5 | 587.3 | |
| 4#Re | 55 | #d2 | #D5 | 622.2 | |
| 5Mi | 56 | e2 | E5 | 659.2 | |
| 6Fa | 57 | f2 | F5 | 698.4 | |
| 7#Fa | 58 | #f2 | #F5 | 739.9 | |
| 8Sol | 59 | g2 | G5 | 784.0 | |
| 9#Sol | 60 | #g2 | #G5 | 830.6 | |
| 10La | 61 | a2 | A5 | 880.0 | |
| 11#La | 62 | #a2 | #A5 | 932.3 | |
| 12Si | 63 | b2 | B5 | 987.7 | |
| 1Do | 64 | c3 | C6 | 1046.5 | 小字三組 |
| 2#Do | 65 | #c3 | #C6 | 1108.7 | |
| 3Re | 66 | d3 | D6 | 1174.6 | |
| 4#Re | 67 | #d3 | #D6 | 1244.5 | |
| 5Mi | 68 | e3 | E6 | 1318.5 | |
| 6Fa | 69 | f3 | F6 | 1396.9 | |
| 7#Fa | 70 | #f3 | #F6 | 1479.9 | |
| 8Sol | 71 | g3 | G6 | 1567.9 | |
| 9#Sol | 72 | #g3 | #G6 | 1661.2 | |
| 10La | 73 | a3 | A6 | 1760.0 | |
| 11#La | 74 | #a3 | #A6 | 1864.6 | |
| 12Si | 75 | b3 | B6 | 1975.5 | |
| 1Do | 76 | c4 | C7 | 2093.0 | 小字四組 |
| 2#Do | 77 | #c4 | #C7 | 2217.4 | |
| 3Re | 78 | d4 | D7 | 2348.9 | |
| 4#Re | 79 | #d4 | #D7 | 2489.0 | |
| 5Mi | 80 | e4 | E7 | 2367.0 | |
| 6Fa | 81 | f4 | F7 | 2793.8 | |
| 7#Fa | 82 | #f4 | #F7 | 2959.9 | |
| 8Sol | 83 | g4 | G7 | 3135.9 | |
| 9#Sol | 84 | #g4 | #G7 | 3322.4 | |
| 10La | 85 | a4 | A7 | 3520.0 | |
| 11#La | 86 | #a4 | #A7 | 3729.3 | |
| 12Si | 87 | b4 | B7 | 3951.1 | |
| 1Do | 88 | c5 | C8 | 4186.0 | 小字五組 |
求頻率公式
F=27.5*2(J-1)/12
求音級(鍵號)公式
J=(12*lg(F/27.5))/lg2+1
F:為頻率,單位為赫茲(Hz)
J:為鋼琴序號,從1開始編號,可以帶小數,小數部分為音分數
1:琴鍵號以一開始編址
12:分成12個律
27.5:如過a1等於440赫茲(Hz)則A2等於27.5赫茲(Hz)
例求C2音第52鍵的頻率
f=27.5*2(52-1)/12
f=27.5*(12√2)51
f=27.5*19.027314
f=523.25赫茲(Hz)
C2音頻率523.25赫茲(Hz)
例求a1+15音分第49鍵
f=27.5*2(49.15-1)/12
f=27.5*(12√2)48.15
f=27.5*16.139232
f=443.83赫茲(Hz)
a1+15音頻率443.83赫茲(Hz)
例求比鋼琴最高音c5還高大二度的d5第90鍵的頻率
f=27.5*2(90-1)/12
f=27.5*(12√2)89
f=27.5*170.859501
f=4698.64赫茲(Hz)
d5音第90鍵的頻率4698.64赫茲(Hz)
求2000頻率(Hz)所對應音級
J=(12*lg(2000/27.5))/lg(2) + 1
J=(12*1.861697)/lg(2) + 1
J=74.21+1
J=75.21
2000頻率(Hz)對應75號鍵,高21音分.
求4500頻率(Hz)所對應音級
J=(12*lg(4500/27.5))/lg(2) + 1
J=(12*2.21388)/0.30103 + 1
J=88.25+1
J=89.25
4500頻率(Hz)對應89號鍵,高25音分