Musical notes and their frequencies.
Clicking on the frequency will get you a one minute OGG audio file with a
sine wave of that frequency. Except for the 440 Hz file which is two
minutes.
Peek level is 25 % of clip level.
Don't play these files at high volume!
The really low and high frequencies may ruin your speakers!
Note: These are pure sine waves. So the really low frequencies are
inaudible! You may see your speakers' diaphragm move without hearing
anything. If you do hear something this is due to distortion causing
harmonics.
Meanwhile very large currents flow though your speakers!
| Scientific | Midi | Helmholtz | Name | Feet | Frequency Hz |
λ (17.8 °C) | |
|---|---|---|---|---|---|---|---|
| Dec | Hex | ||||||
| C₋₁ | 0 | 00 | Cˌˌˌ | Subsubcontra | 64 | 8.176 | 41.9 m |
| C₀ | 12 | 0C | Cˌˌ | Subcontra | 32 | 16.352 | 20.9 m |
| C₁ | 24 | 18 | Cˌ | Contra | 16 | 32.703 | 10.5 m |
| C₂ | 36 | 24 | C | Great | 8 | 65.406 | 5.23 m |
| C₃ | 48 | 30 | c | Small | 4 | 130.813 | 2.62 m |
| C₄ | 60 | 3C | c′ | One-lined | 2 | 261.626 | 1.31 m |
| C₅ | 72 | 48 | c″ | Two-lined | 1 | 523.251 | 654 mm |
| C₆ | 84 | 54 | c′″ | Three-lined | ½ | 1046.502 | 327 mm |
| C₇ | 96 | 60 | c″″ | Four-lined | ¼ | 2093.005 | 164 mm |
| C₈ | 108 | 6C | c′″″ | Five-lined | ⅛ | 4186.009 | 82 mm |
| C₉ | 120 | 78 | c″″″ | Six-lined | ⅟₁₆ | 8372.018 | 41 mm |
| C₁₀ | 16744.036 | 20 mm | |||||
'Feet' is the height of an organ pipe with a slit at the bottom and a open top. These pipes are slightly shorter then a half wavelength. One foot is 304.8 mm. So a 16 Hz organ pipe is about 10 m tall.
The frequency ratio of two successive notes is 1 : ¹²√2 ≈ 1 : 1.059463094
Don't play these files at high volume!
| Note | Octave | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| -1 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |
| C | 8.176 | 16.352 | 32.703 | 65.406 | 130.81 | 261.63 | 523.25 | 1046.5 | 2093.0 | 4186.0 | 8372 | 16744 |
| C♯ | 8.662 | 17.324 | 34.648 | 69.296 | 138.59 | 277.18 | 554.37 | 1108.7 | 2217.5 | 4434.9 | 8870 | 17740 |
| D | 9.177 | 18.354 | 36.708 | 73.416 | 146.83 | 293.66 | 587.33 | 1174.7 | 2349.3 | 4698.6 | 9397 | 18794 |
| D♯ | 9.723 | 19.445 | 38.891 | 77.782 | 155.56 | 311.13 | 622.25 | 1244.5 | 2489.0 | 4978.0 | 9956 | 19912 |
| E | 10.301 | 20.602 | 41.203 | 82.407 | 164.81 | 329.63 | 659.26 | 1318.5 | 2637.0 | 5274.0 | 10548 | 21096 |
| F | 10.913 | 21.827 | 43.654 | 87.307 | 174.61 | 349.23 | 698.46 | 1396.9 | 2793.8 | 5587.7 | 11175 | 22351 |
| F♯ | 11.562 | 23.125 | 46.249 | 92.499 | 185.00 | 369.99 | 739.99 | 1480.0 | 2960.0 | 5919.9 | 11840 | 23680 |
| G | 12.250 | 24.500 | 48.999 | 97.999 | 196.00 | 392.00 | 783.99 | 1568.0 | 3136.0 | 6271.9 | 12544 | 25088 |
| G♯ | 12.978 | 25.957 | 51.913 | 103.826 | 207.65 | 415.30 | 830.61 | 1661.2 | 3322.4 | 6644.9 | 13290 | 26580 |
| A | 13.750 | 27.500 | 55.000 | 110.000 | 220.00 | 440.00 | 880.00 | 1760.0 | 3520.0 | 7040.0 | 14080 | 28160 |
| A♯ | 14.568 | 29.135 | 58.270 | 116.541 | 233.08 | 466.16 | 932.33 | 1864.7 | 3729.3 | 7458.6 | 14917 | 29834 |
| B | 15.434 | 30.868 | 61.735 | 123.471 | 246.94 | 493.88 | 987.77 | 1975.5 | 3951.1 | 7902.1 | 15804 | 31608 |
F₃ is the F-Clef:
𝄢
C₄ is the central C.
G₄ is the G-Clef:
𝄞
A₄ is the 440 Hz tuning fork A.
A typical piano range is from A₀ (88 keys)
or C₁ (85 keys) to
C₈.
Midi note 0 is C₋₁,
midi note 127 is G₉.
Most telephone systems can cope with octaves 4 to 7 (D♯₄ to G♯₇). Some may
get a bit lower (G♯₃).
Most digital audio systems make it to roughly halfway octave 10 (E₁₀ or F♯₁₀).