A western twelve tone equal temperament reference table in hertz. C4 is the middle C
| | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| C | 16.352 | 32.703 | 65.406 | 130.813 | 261.626 | 523.251 | 1046.502 | 2093.005 | 4186.009 | 8372.018 | 16744.036 |
| C#/Db | 17.324 | 34.648 | 69.296 | 138.591 | 277.183 | 554.365 | 1108.731 | 2217.461 | 4434.922 | 8869.844 | 17739.688 |
| D | 18.354 | 36.708 | 73.416 | 146.832 | 293.665 | 587.33 | 1174.659 | 2349.318 | 4698.636 | 9397.273 | 18794.545 |
| D#/Eb | 19.445 | 38.891 | 77.782 | 155.563 | 311.127 | 622.254 | 1244.508 | 2489.016 | 4978.032 | 9956.063 | 19912.127 |
| E | 20.602 | 41.203 | 82.407 | 164.814 | 329.628 | 659.255 | 1318.51 | 2637.02 | 5274.041 | 10548.082 | 21096.164 |
| F | 21.827 | 43.654 | 87.307 | 174.614 | 349.228 | 698.456 | 1396.913 | 2793.826 | 5587.652 | 11175.303 | 22350.607 |
| F#/Gb | 23.125 | 46.249 | 92.499 | 184.997 | 369.994 | 739.989 | 1479.978 | 2959.955 | 5919.911 | 11839.822 | 23679.643 |
| G | 24.5 | 48.999 | 97.999 | 195.998 | 391.995 | 783.991 | 1567.982 | 3135.963 | 6271.927 | 12543.854 | 25087.708 |
| G#/Ab | 25.957 | 51.913 | 103.826 | 207.652 | 415.305 | 830.609 | 1661.219 | 3322.438 | 6644.875 | 13289.75 | 26579.501 |
| A | 27.5 | 55 | 110 | 220 | 440 | 880 | 1760 | 3520 | 7040 | 14080 | 28160 |
| A#/Bb | 29.135 | 58.27 | 116.541 | 233.082 | 466.164 | 932.328 | 1864.655 | 3729.31 | 7458.62 | 14917.24 | 29834.481 |
| B | 30.868 | 61.735 | 123.471 | 246.942 | 493.883 | 987.767 | 1975.533 | 3951.066 | 7902.133 | 15804.266 | 31608.531 |