Difference between revisions of "NoteFreq"
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| − | <c> | + | <c>noteFreq</c> is a public function that calculates the correct frequency for a given note. Notes are specified by [https://www.inspiredacoustics.com/en/MIDI_note_numbers_and_center_frequencies MIDI note number], where 60 is middle C, and there are 12 notes per octave. Thus 61 is middle C#, 62 is D above middle C, and 72 (12 values above 60) is "high C" (one octave above middle C). |
| + | |||
| + | === Usage === | ||
| + | |||
| + | Use the result of the `noteFreq` call as the `frequency` parameter to [[Sound.init]] (or assign it to [[Sound.freq]]. Assuming the [[Sound.waveform|waveform]] of the sound is a single cycle, the resulting sound will have the correct pitch for the note value passed to `noteFreq`. | ||
| + | |||
| + | === Example === | ||
| + | |||
| + | This example plays middle C for 1 second. | ||
| + | |||
| + | <ms>snd = new Sound | ||
| + | snd.init 1, noteFreq(60) | ||
| + | snd.play</ms> | ||
| + | |||
| + | === Value Table === | ||
| + | |||
| + | The table below shows notes and frequency values for all 127 standard MIDI notes. However, the <c>noteFreq</c> function also accepts non-integer values, making off-pitch notes as desired. | ||
{| class="wikitable" | {| class="wikitable" | ||
|- | |- | ||
| − | ! | + | ! Note Number !! Musical Note !! Frequency |
|- | |- | ||
! 0 !! C<sub>-1</sub> !! 8.1758 | ! 0 !! C<sub>-1</sub> !! 8.1758 | ||
Revision as of 03:31, 31 July 2020
noteFreq is a public function that calculates the correct frequency for a given note. Notes are specified by MIDI note number, where 60 is middle C, and there are 12 notes per octave. Thus 61 is middle C#, 62 is D above middle C, and 72 (12 values above 60) is "high C" (one octave above middle C).
Usage
Use the result of the `noteFreq` call as the `frequency` parameter to Sound.init (or assign it to Sound.freq. Assuming the waveform of the sound is a single cycle, the resulting sound will have the correct pitch for the note value passed to `noteFreq`.
Example
This example plays middle C for 1 second.
snd = new Sound
snd.init 1, noteFreq(60)
snd.play
Value Table
The table below shows notes and frequency values for all 127 standard MIDI notes. However, the noteFreq function also accepts non-integer values, making off-pitch notes as desired.
| Note Number | Musical Note | Frequency |
|---|---|---|
| 0 | C-1 | 8.1758 |
| 1 | C#-1 | 8.6620 |
| 2 | D-1 | 9.1770 |
| 3 | D#-1 | 9.7227 |
| 4 | E-1 | 10.301 |
| 5 | F-1 | 10.914 |
| 6 | F#-1 | 11.563 |
| 7 | G-1 | 12.250 |
| 8 | G#-1 | 12.979 |
| 9 | A-1 | 13.750 |
| 10 | A#-1 | 14.568 |
| 11 | B-1 | 15.434 |
| 12 | C0 | 16.352 |
| 13 | C#0 | 17.324 |
| 14 | D0 | 18.354 |
| 15 | D#0 | 19.445 |
| 16 | E0 | 20.602 |
| 17 | F0 | 21.827 |
| 18 | F#0 | 23.125 |
| 19 | G0 | 24.500 |
| 20 | G#0 | 25.957 |
| 21 | A0 | 27.500 |
| 22 | A#0 | 29.135 |
| 23 | B0 | 30.868 |
| 24 | C1 | 32.703 |
| 25 | C#1 | 34.648 |
| 26 | D1 | 36.708 |
| 27 | D#1 | 38.891 |
| 28 | E1 | 41.203 |
| 29 | F1 | 43.654 |
| 30 | F#1 | 46.249 |
| 31 | G1 | 48.999 |
| 32 | G#1 | 51.913 |
| 33 | A1 | 55.000 |
| 34 | A#1 | 58.270 |
| 35 | B1 | 61.735 |
| 36 | C2 | 65.406 |
| 37 | C#2 | 69.296 |
| 38 | D2 | 73.416 |
| 39 | D#2 | 77.782 |
| 40 | E2 | 82.407 |
| 41 | F2 | 87.307 |
| 42 | F#2 | 92.499 |
| 43 | G2 | 97.999 |
| 44 | G#2 | 103.83 |
| 45 | A2 | 110.00 |
| 46 | A#2 | 116.54 |
| 47 | B2 | 123.47 |
| 48 | C3 | 130.81 |
| 49 | C#3 | 138.59 |
| 50 | D3 | 146.83 |
| 51 | D#3 | 155.56 |
| 52 | E3 | 164.81 |
| 53 | F3 | 174.61 |
| 54 | F#3 | 185.00 |
| 55 | G3 | 196.00 |
| 56 | G#3 | 207.65 |
| 57 | A3 | 220.00 |
| 58 | A#3 | 233.08 |
| 59 | B3 | 246.94 |
| 60 | Middle C4 | 261.63 |
| 61 | C#4 | 277.18 |
| 62 | D4 | 293.66 |
| 63 | D#4 | 311.13 |
| 64 | E4 | 329.63 |
| 65 | F4 | 349.23 |
| 66 | F#4 | 369.99 |
| 67 | G4 | 392.00 |
| 68 | G#4 | 415.30 |
| 69 | A4 | 440.00 |
| 70 | A#4 | 466.16 |
| 71 | B4 | 193.88 |
| 72 | C5 | 523.25 |
| 73 | C#5 | 554.37 |
| 74 | D5 | 587.33 |
| 75 | D#5 | 622.25 |
| 76 | E5 | 659.26 |
| 77 | F5 | 698.46 |
| 78 | F#5 | 739.99 |
| 79 | G5 | 783.99 |
| 80 | G#5 | 830.61 |
| 81 | A5 | 880.00 |
| 82 | A#5 | 932.33 |
| 83 | B5 | 987.77 |
| 84 | C6 | 1046.5 |
| 85 | C#6 | 1108.7 |
| 86 | D6 | 1174.7 |
| 87 | D#6 | 1244.5 |
| 88 | E6 | 1318.5 |
| 89 | F6 | 1396.6 |
| 90 | F#6 | 1480.0 |
| 91 | G6 | 1568.0 |
| 92 | G#6 | 1661.2 |
| 93 | A6 | 1760.0 |
| 94 | A#6 | 1864.7 |
| 95 | B6 | 1975.5 |
| 96 | C7 | 2093.0 |
| 97 | C#7 | 2217.5 |
| 98 | D7 | 2349.3 |
| 99 | D#7 | 2489.0 |
| 100 | E7 | 2637.0 |
| 101 | F7 | 2793.8 |
| 102 | F#7 | 2960.0 |
| 103 | G7 | 3136.0 |
| 104 | G#7 | 3322.4 |
| 105 | A7 | 3520.0 |
| 106 | A#7 | 3729.3 |
| 107 | B7 | 3951.1 |
| 108 | C8 | 4186.0 |
| 109 | C#8 | 4434.9 |
| 110 | D8 | 4698.6 |
| 111 | D#8 | 4978.0 |
| 112 | E8 | 5274.0 |
| 113 | F8 | 5587.7 |
| 114 | F#8 | 5919.9 |
| 115 | G8 | 6271.9 |
| 116 | G#8 | 6644.9 |
| 117 | A8 | 7040.0 |
| 118 | A#8 | 7458.6 |
| 119 | B8 | 7902.1 |
| 120 | C9 | 8372.0 |
| 121 | C#9 | 8869.8 |
| 122 | D9 | 9697.3 |
| 123 | D#9 | 9956.1 |
| 124 | E9 | 10548 |
| 125 | F9 | 11175 |
| 126 | F#9 | 11840 |
| 127 | G9 | 12544 |
Table is in Scientific Pitch Notation.
