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 |
|---|---|---|---|
| C1 | 24 | -1.000 | 32.70 |
| C♯1 | 25 | -0.917 | 34.65 |
| D1 | 26 | -0.833 | 36.71 |
| D♯1 | 27 | -0.750 | 38.89 |
| E1 | 28 | -0.667 | 41.20 |
| F1 | 29 | -0.583 | 43.65 |
| F♯1 | 30 | -0.500 | 46.25 |
| G1 | 31 | -0.417 | 49.00 |
| G♯1 | 32 | -0.333 | 51.91 |
| A1 | 33 | -0.250 | 55.00 |
| A♯1 | 34 | -0.167 | 58.27 |
| B1 | 35 | -0.083 | 61.74 |
| C2 | 36 | 0.000 | 65.41 |
| C♯2 | 37 | 0.083 | 69.30 |
| D2 | 38 | 0.167 | 73.42 |
| D♯2 | 39 | 0.250 | 77.78 |
| E2 | 40 | 0.333 | 82.41 |
| F2 | 41 | 0.417 | 87.31 |
| F♯2 | 42 | 0.500 | 92.50 |
| G2 | 43 | 0.583 | 98.00 |
| G♯2 | 44 | 0.667 | 103.83 |
| A2 | 45 | 0.750 | 110.00 |
| A♯2 | 46 | 0.833 | 116.54 |
| B2 | 47 | 0.917 | 123.47 |
| C3 | 48 | 1.000 | 130.81 |
| C♯3 | 49 | 1.083 | 138.59 |
| D3 | 50 | 1.167 | 146.83 |
| D♯3 | 51 | 1.250 | 155.56 |
| E3 | 52 | 1.333 | 164.81 |
| F3 | 53 | 1.417 | 174.61 |
| F♯3 | 54 | 1.500 | 185.00 |
| G3 | 55 | 1.583 | 196.00 |
| G♯3 | 56 | 1.667 | 207.65 |
| A3 | 57 | 1.750 | 220.00 |
| A♯3 | 58 | 1.833 | 233.08 |
| B3 | 59 | 1.917 | 246.94 |
| C4 | 60 | 2.000 | 261.63 |
| C♯4 | 61 | 2.083 | 277.18 |
| D4 | 62 | 2.167 | 293.66 |
| D♯4 | 63 | 2.250 | 311.13 |
| E4 | 64 | 2.333 | 329.63 |
| F4 | 65 | 2.417 | 349.23 |
| F♯4 | 66 | 2.500 | 369.99 |
| G4 | 67 | 2.583 | 392.00 |
| G♯4 | 68 | 2.667 | 415.30 |
| A4 | 69 | 2.750 | 440.00 |
| A♯4 | 70 | 2.833 | 466.16 |
| B4 | 71 | 2.917 | 493.88 |
| C5 | 72 | 3.000 | 523.25 |
| C♯5 | 73 | 3.083 | 554.37 |
| D5 | 74 | 3.167 | 587.33 |
| D♯5 | 75 | 3.250 | 622.25 |
| E5 | 76 | 3.333 | 659.26 |
| F5 | 77 | 3.417 | 698.46 |
| F♯5 | 78 | 3.500 | 739.99 |
| G5 | 79 | 3.583 | 783.99 |
| G♯5 | 80 | 3.667 | 830.61 |
| A5 | 81 | 3.750 | 880.00 |
| A♯5 | 82 | 3.833 | 932.33 |
| B5 | 83 | 3.917 | 987.77 |
| C6 | 84 | 4.000 | 1046.50 |
| C♯6 | 85 | 4.083 | 1108.73 |
| D6 | 86 | 4.167 | 1174.66 |
| D♯6 | 87 | 4.250 | 1244.51 |
| E6 | 88 | 4.333 | 1318.51 |
| F6 | 89 | 4.417 | 1396.91 |
| F♯6 | 90 | 4.500 | 1479.98 |
| G6 | 91 | 4.583 | 1567.98 |
| G♯6 | 92 | 4.667 | 1661.22 |
| A6 | 93 | 4.750 | 1760.00 |
| A♯6 | 94 | 4.833 | 1864.66 |
| B6 | 95 | 4.917 | 1975.53 |
| C7 | 96 | 5.000 | 2093.00 |
| C♯7 | 97 | 5.083 | 2217.46 |
| D7 | 98 | 5.167 | 2349.32 |
| D♯7 | 99 | 5.250 | 2489.02 |
| E7 | 100 | 5.333 | 2637.02 |
| F7 | 101 | 5.417 | 2793.83 |
| F♯7 | 102 | 5.500 | 2959.96 |
| G7 | 103 | 5.583 | 3135.96 |
| G♯7 | 104 | 5.667 | 3322.44 |
| A7 | 105 | 5.750 | 3520.00 |
| A♯7 | 106 | 5.833 | 3729.31 |
| B7 | 107 | 5.917 | 3951.07 |
| C8 | 108 | 6.000 | 4186.01 |
Electronic music making appendices: Akai S1000 page map | Atari ST MIDI sequencer timeline | Pitches