ByteNoise

Appendix: pitches

This table shows which MIDI note number, note name, and frequency in Hertz are all equivalent, as per ISO 16 (which dictates that in standardised twelve tone equal temperament, A4 is 440 Hz), and the MIDI specification (which dictates that middle C, C4, is MIDI note number 60).

The voltages are more contentious. Depending on your equipment, you may need to compensate by a volt in either direction.

Name MIDI Voltage Frequency
C-1 24 -1.000 32.70
C♯1 25 -0.917 34.65
D-1 26 -0.833 36.71
D♯1 27 -0.750 38.89
E-1 28 -0.667 41.20
F-1 29 -0.583 43.65
F♯1 30 -0.500 46.25
G-1 31 -0.417 49.00
G♯1 32 -0.333 51.91
A-1 33 -0.250 55.00
A♯1 34 -0.167 58.27
B-1 35 -0.083 61.74
C-2 36 0.000 65.41
C♯2 37 0.083 69.30
D-2 38 0.167 73.42
D♯2 39 0.250 77.78
E-2 40 0.333 82.41
F-2 41 0.417 87.31
F♯2 42 0.500 92.50
G-2 43 0.583 98.00
G♯2 44 0.667 103.83
A-2 45 0.750 110.00
A♯2 46 0.833 116.54
B-2 47 0.917 123.47
C-3 48 1.000 130.81
C♯3 49 1.083 138.59
D-3 50 1.167 146.83
D♯3 51 1.250 155.56
E-3 52 1.333 164.81
F-3 53 1.417 174.61
F♯3 54 1.500 185.00
G-3 55 1.583 196.00
G♯3 56 1.667 207.65
A-3 57 1.750 220.00
A♯3 58 1.833 233.08
B-3 59 1.917 246.94
C-4 60 2.000 261.63
C♯4 61 2.083 277.18
D-4 62 2.167 293.66
D♯4 63 2.250 311.13
E-4 64 2.333 329.63
F-4 65 2.417 349.23
F♯4 66 2.500 369.99
G-4 67 2.583 392.00
G♯4 68 2.667 415.30
A-4 69 2.750 440.00
A♯4 70 2.833 466.16
B-4 71 2.917 493.88
C-5 72 3.000 523.25
C♯5 73 3.083 554.37
D-5 74 3.167 587.33
D♯5 75 3.250 622.25
E-5 76 3.333 659.26
F-5 77 3.417 698.46
F♯5 78 3.500 739.99
G-5 79 3.583 783.99
G♯5 80 3.667 830.61
A-5 81 3.750 880.00
A♯5 82 3.833 932.33
B-5 83 3.917 987.77
C-6 84 4.000 1046.50
C♯6 85 4.083 1108.73
D-6 86 4.167 1174.66
D♯6 87 4.250 1244.51
E-6 88 4.333 1318.51
F-6 89 4.417 1396.91
F♯6 90 4.500 1479.98
G-6 91 4.583 1567.98
G♯6 92 4.667 1661.22
A-6 93 4.750 1760.00
A♯6 94 4.833 1864.66
B-6 95 4.917 1975.53
C-7 96 5.000 2093.00
C♯7 97 5.083 2217.46
D-7 98 5.167 2349.32
D♯7 99 5.250 2489.02
E-7 100 5.333 2637.02
F-7 101 5.417 2793.83
F♯7 102 5.500 2959.96
G-7 103 5.583 3135.96
G♯7 104 5.667 3322.44
A-7 105 5.750 3520.00
A♯7 106 5.833 3729.31
B-7 107 5.917 3951.07
C-8 108 6.000 4186.01