Class FrequencyClass<Type>

Frequency is a primitive type for encoding Frequency values. Eventually all time values are evaluated to hertz using the valueOf method.

Example

Tone.Frequency("C3"); // 261
Tone.Frequency(38, "midi");
Tone.Frequency("C3").transpose(4);

Type Parameters

Type extends number = Hertz

Hierarchy (view full)

TimeClass<Type, FrequencyUnit>
- FrequencyClass
  - MidiClass

Index

Constructors

constructor

new FrequencyClass<Type>(context, value?, units?): FrequencyClass<Type>
Type Parameters
- Type extends number = number
Parameters
- context: BaseContext
  The context associated with the time value. Used to compute Transport and context-relative timing.
- Optional value: TimeValue
  The time value as a number, string or object
- Optional units: FrequencyUnit
  Unit values
Returns FrequencyClass<Type>
Inherited from TimeClass.constructor
- Defined in Tone/core/type/TimeBase.ts:78

Properties

`Readonly` context

context: BaseContext

debug

debug: boolean = false

Set this debug flag to log all events that happen in this class.

`Readonly` defaultUnits

defaultUnits: FrequencyUnit = "hz"

The default units

`Readonly` name

name: string = "Frequency"

`Static` version

version: string = version

The version number semver

Accessors

disposed

get disposed(): boolean
Indicates if the instance was disposed. 'Disposing' an instance means that all of the Web Audio nodes that were created for the instance are disconnected and freed for garbage collection.

Returns boolean
Inherited from TimeClass.disposed
- Defined in Tone/core/Tone.ts:96

`Static` A4

get A4(): number
The concert tuning pitch which is used to generate all the other pitch values from notes. A4's values in Hertz.

Returns number
- Defined in Tone/core/type/Frequency.ts:40
set A4(freq): void
Parameters
- freq: number
Returns void
- Defined in Tone/core/type/Frequency.ts:43

Methods

dispose

dispose(): this
disconnect and dispose.

Returns this
Inherited from TimeClass.dispose
- Defined in Tone/core/Tone.ts:86

fromType

fromType(type): this
Coerce a time type into this units type.
Parameters
- type: TimeBaseClass<any, any>
  Any time type units
Returns this
Inherited from TimeClass.fromType
- Defined in Tone/core/type/TimeBase.ts:304

harmonize

harmonize(intervals): FrequencyClass<number>[]
Takes an array of semitone intervals and returns an array of frequencies transposed by those intervals.
Parameters
- intervals: number[]
Returns FrequencyClass<number>[]
Returns an array of Frequencies
Example
```
Tone.Frequency("A4").harmonize([0, 3, 7]); // ["A4", "C5", "E5"]
```
- Defined in Tone/core/type/Frequency.ts:120

quantize

quantize(subdiv, percent?): Type
Quantize the time by the given subdivision. Optionally add a percentage which will move the time value towards the ideal quantized value by that percentage.
Parameters
- subdiv: Unit.Time
  The subdivision to quantize to
- percent: number = 1
  Move the time value towards the quantized value by a percentage.
Returns Type
Example
```
Tone.Time(21).quantize(2); // returns 22
Tone.Time(0.6).quantize("4n", 0.5); // returns 0.55
```
Inherited from TimeClass.quantize
- Defined in Tone/core/type/Time.ts:70

toBarsBeatsSixteenths

toBarsBeatsSixteenths(): `${number}:${number}:${number}`
Return the time encoded as Bars:Beats:Sixteenths.

Returns `${number}:${number}:${number}`
Inherited from TimeClass.toBarsBeatsSixteenths
- Defined in Tone/core/type/Time.ts:128

toFrequency

toFrequency(): number
Return the value in hertz

Returns number
Inherited from TimeClass.toFrequency
- Defined in Tone/core/type/TimeBase.ts:341

toMidi

toMidi(): 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 101 | 102 | 103 | 104 | 105 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 | 124 | 125 | 126 | 127
Return the value of the frequency as a MIDI note

Returns 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 101 | 102 | 103 | 104 | 105 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 | 124 | 125 | 126 | 127
Example
```
Tone.Frequency("C4").toMidi(); // 60
```
Overrides TimeClass.toMidi
- Defined in Tone/core/type/Frequency.ts:135

toMilliseconds

toMilliseconds(): number
Return the time in milliseconds.

Returns number
Inherited from TimeClass.toMilliseconds
- Defined in Tone/core/type/TimeBase.ts:355

toNotation

toNotation(): Subdivision
Convert a Time to Notation. The notation values are will be the closest representation between 1m to 128th note.

Returns Subdivision
Example
```
// if the Transport is at 120bpm:
Tone.Time(2).toNotation(); // returns "1m"
```
Inherited from TimeClass.toNotation
- Defined in Tone/core/type/Time.ts:93

toNote

toNote(): "C0" | "C4" | "C-4" | "C3" | "C-3" | "C2" | "C-2" | "C1" | "C-1" | "C5" | "C6" | "C7" | "C8" | "C9" | "C10" | "C11" | "Cbb0" | "Cbb4" | "Cbb-4" | "Cbb3" | "Cbb-3" | "Cbb2" | "Cbb-2" | "Cbb1" | "Cbb-1" | "Cbb5" | "Cbb6" | "Cbb7" | "Cbb8" | "Cbb9" | "Cbb10" | "Cbb11" | "Cb0" | "Cb4" | "Cb-4" | "Cb3" | "Cb-3" | "Cb2" | "Cb-2" | "Cb1" | "Cb-1" | "Cb5" | "Cb6" | "Cb7" | "Cb8" | "Cb9" | "Cb10" | "Cb11" | "C#0" | "C#4" | "C#-4" | "C#3" | "C#-3" | "C#2" | "C#-2" | "C#1" | "C#-1" | "C#5" | "C#6" | "C#7" | "C#8" | "C#9" | "C#10" | "C#11" | "Cx0" | "Cx4" | "Cx-4" | "Cx3" | "Cx-3" | "Cx2" | "Cx-2" | "Cx1" | "Cx-1" | "Cx5" | "Cx6" | "Cx7" | "Cx8" | "Cx9" | "Cx10" | "Cx11" | "D0" | "D4" | "D-4" | "D3" | "D-3" | "D2" | "D-2" | "D1" | "D-1" | "D5" | "D6" | "D7" | "D8" | "D9" | "D10" | "D11" | "Dbb0" | "Dbb4" | "Dbb-4" | "Dbb3" | "Dbb-3" | "Dbb2" | "Dbb-2" | "Dbb1" | "Dbb-1" | "Dbb5" | "Dbb6" | "Dbb7" | "Dbb8" | "Dbb9" | "Dbb10" | "Dbb11" | "Db0" | "Db4" | "Db-4" | "Db3" | "Db-3" | "Db2" | "Db-2" | "Db1" | "Db-1" | "Db5" | "Db6" | "Db7" | "Db8" | "Db9" | "Db10" | "Db11" | "D#0" | "D#4" | "D#-4" | "D#3" | "D#-3" | "D#2" | "D#-2" | "D#1" | "D#-1" | "D#5" | "D#6" | "D#7" | "D#8" | "D#9" | "D#10" | "D#11" | "Dx0" | "Dx4" | "Dx-4" | "Dx3" | "Dx-3" | "Dx2" | "Dx-2" | "Dx1" | "Dx-1" | "Dx5" | "Dx6" | "Dx7" | "Dx8" | "Dx9" | "Dx10" | "Dx11" | "E0" | "E4" | "E-4" | "E3" | "E-3" | "E2" | "E-2" | "E1" | "E-1" | "E5" | "E6" | "E7" | "E8" | "E9" | "E10" | "E11" | "Ebb0" | "Ebb4" | "Ebb-4" | "Ebb3" | "Ebb-3" | "Ebb2" | "Ebb-2" | "Ebb1" | "Ebb-1" | "Ebb5" | "Ebb6" | "Ebb7" | "Ebb8" | "Ebb9" | "Ebb10" | "Ebb11" | "Eb0" | "Eb4" | "Eb-4" | "Eb3" | "Eb-3" | "Eb2" | "Eb-2" | "Eb1" | "Eb-1" | "Eb5" | "Eb6" | "Eb7" | "Eb8" | "Eb9" | "Eb10" | "Eb11" | "E#0" | "E#4" | "E#-4" | "E#3" | "E#-3" | "E#2" | "E#-2" | "E#1" | "E#-1" | "E#5" | "E#6" | "E#7" | "E#8" | "E#9" | "E#10" | "E#11" | "Ex0" | "Ex4" | "Ex-4" | "Ex3" | "Ex-3" | "Ex2" | "Ex-2" | "Ex1" | "Ex-1" | "Ex5" | "Ex6" | "Ex7" | "Ex8" | "Ex9" | "Ex10" | "Ex11" | "F0" | "F4" | "F-4" | "F3" | "F-3" | "F2" | "F-2" | "F1" | "F-1" | "F5" | "F6" | "F7" | "F8" | "F9" | "F10" | "F11" | "Fbb0" | "Fbb4" | "Fbb-4" | "Fbb3" | "Fbb-3" | "Fbb2" | "Fbb-2" | "Fbb1" | "Fbb-1" | "Fbb5" | "Fbb6" | "Fbb7" | "Fbb8" | "Fbb9" | "Fbb10" | "Fbb11" | "Fb0" | "Fb4" | "Fb-4" | "Fb3" | "Fb-3" | "Fb2" | "Fb-2" | "Fb1" | "Fb-1" | "Fb5" | "Fb6" | "Fb7" | "Fb8" | "Fb9" | "Fb10" | "Fb11" | "F#0" | "F#4" | "F#-4" | "F#3" | "F#-3" | "F#2" | "F#-2" | "F#1" | "F#-1" | "F#5" | "F#6" | "F#7" | "F#8" | "F#9" | "F#10" | "F#11" | "Fx0" | "Fx4" | "Fx-4" | "Fx3" | "Fx-3" | "Fx2" | "Fx-2" | "Fx1" | "Fx-1" | "Fx5" | "Fx6" | "Fx7" | "Fx8" | "Fx9" | "Fx10" | "Fx11" | "G0" | "G4" | "G-4" | "G3" | "G-3" | "G2" | "G-2" | "G1" | "G-1" | "G5" | "G6" | "G7" | "G8" | "G9" | "G10" | "G11" | "Gbb0" | "Gbb4" | "Gbb-4" | "Gbb3" | "Gbb-3" | "Gbb2" | "Gbb-2" | "Gbb1" | "Gbb-1" | "Gbb5" | "Gbb6" | "Gbb7" | "Gbb8" | "Gbb9" | "Gbb10" | "Gbb11" | "Gb0" | "Gb4" | "Gb-4" | "Gb3" | "Gb-3" | "Gb2" | "Gb-2" | "Gb1" | "Gb-1" | "Gb5" | "Gb6" | "Gb7" | "Gb8" | "Gb9" | "Gb10" | "Gb11" | "G#0" | "G#4" | "G#-4" | "G#3" | "G#-3" | "G#2" | "G#-2" | "G#1" | "G#-1" | "G#5" | "G#6" | "G#7" | "G#8" | "G#9" | "G#10" | "G#11" | "Gx0" | "Gx4" | "Gx-4" | "Gx3" | "Gx-3" | "Gx2" | "Gx-2" | "Gx1" | "Gx-1" | "Gx5" | "Gx6" | "Gx7" | "Gx8" | "Gx9" | "Gx10" | "Gx11" | "A0" | "A4" | "A-4" | "A3" | "A-3" | "A2" | "A-2" | "A1" | "A-1" | "A5" | "A6" | "A7" | "A8" | "A9" | "A10" | "A11" | "Abb0" | "Abb4" | "Abb-4" | "Abb3" | "Abb-3" | "Abb2" | "Abb-2" | "Abb1" | "Abb-1" | "Abb5" | "Abb6" | "Abb7" | "Abb8" | "Abb9" | "Abb10" | "Abb11" | "Ab0" | "Ab4" | "Ab-4" | "Ab3" | "Ab-3" | "Ab2" | "Ab-2" | "Ab1" | "Ab-1" | "Ab5" | "Ab6" | "Ab7" | "Ab8" | "Ab9" | "Ab10" | "Ab11" | "A#0" | "A#4" | "A#-4" | "A#3" | "A#-3" | "A#2" | "A#-2" | "A#1" | "A#-1" | "A#5" | "A#6" | "A#7" | "A#8" | "A#9" | "A#10" | "A#11" | "Ax0" | "Ax4" | "Ax-4" | "Ax3" | "Ax-3" | "Ax2" | "Ax-2" | "Ax1" | "Ax-1" | "Ax5" | "Ax6" | "Ax7" | "Ax8" | "Ax9" | "Ax10" | "Ax11" | "B0" | "B4" | "B-4" | "B3" | "B-3" | "B2" | "B-2" | "B1" | "B-1" | "B5" | "B6" | "B7" | "B8" | "B9" | "B10" | "B11" | "Bbb0" | "Bbb4" | "Bbb-4" | "Bbb3" | "Bbb-3" | "Bbb2" | "Bbb-2" | "Bbb1" | "Bbb-1" | "Bbb5" | "Bbb6" | "Bbb7" | "Bbb8" | "Bbb9" | "Bbb10" | "Bbb11" | "Bb0" | "Bb4" | "Bb-4" | "Bb3" | "Bb-3" | "Bb2" | "Bb-2" | "Bb1" | "Bb-1" | "Bb5" | "Bb6" | "Bb7" | "Bb8" | "Bb9" | "Bb10" | "Bb11" | "B#0" | "B#4" | "B#-4" | "B#3" | "B#-3" | "B#2" | "B#-2" | "B#1" | "B#-1" | "B#5" | "B#6" | "B#7" | "B#8" | "B#9" | "B#10" | "B#11" | "Bx0" | "Bx4" | "Bx-4" | "Bx3" | "Bx-3" | "Bx2" | "Bx-2" | "Bx1" | "Bx-1" | "Bx5" | "Bx6" | "Bx7" | "Bx8" | "Bx9" | "Bx10" | "Bx11"
Return the value of the frequency in Scientific Pitch Notation

Returns "C0" | "C4" | "C-4" | "C3" | "C-3" | "C2" | "C-2" | "C1" | "C-1" | "C5" | "C6" | "C7" | "C8" | "C9" | "C10" | "C11" | "Cbb0" | "Cbb4" | "Cbb-4" | "Cbb3" | "Cbb-3" | "Cbb2" | "Cbb-2" | "Cbb1" | "Cbb-1" | "Cbb5" | "Cbb6" | "Cbb7" | "Cbb8" | "Cbb9" | "Cbb10" | "Cbb11" | "Cb0" | "Cb4" | "Cb-4" | "Cb3" | "Cb-3" | "Cb2" | "Cb-2" | "Cb1" | "Cb-1" | "Cb5" | "Cb6" | "Cb7" | "Cb8" | "Cb9" | "Cb10" | "Cb11" | "C#0" | "C#4" | "C#-4" | "C#3" | "C#-3" | "C#2" | "C#-2" | "C#1" | "C#-1" | "C#5" | "C#6" | "C#7" | "C#8" | "C#9" | "C#10" | "C#11" | "Cx0" | "Cx4" | "Cx-4" | "Cx3" | "Cx-3" | "Cx2" | "Cx-2" | "Cx1" | "Cx-1" | "Cx5" | "Cx6" | "Cx7" | "Cx8" | "Cx9" | "Cx10" | "Cx11" | "D0" | "D4" | "D-4" | "D3" | "D-3" | "D2" | "D-2" | "D1" | "D-1" | "D5" | "D6" | "D7" | "D8" | "D9" | "D10" | "D11" | "Dbb0" | "Dbb4" | "Dbb-4" | "Dbb3" | "Dbb-3" | "Dbb2" | "Dbb-2" | "Dbb1" | "Dbb-1" | "Dbb5" | "Dbb6" | "Dbb7" | "Dbb8" | "Dbb9" | "Dbb10" | "Dbb11" | "Db0" | "Db4" | "Db-4" | "Db3" | "Db-3" | "Db2" | "Db-2" | "Db1" | "Db-1" | "Db5" | "Db6" | "Db7" | "Db8" | "Db9" | "Db10" | "Db11" | "D#0" | "D#4" | "D#-4" | "D#3" | "D#-3" | "D#2" | "D#-2" | "D#1" | "D#-1" | "D#5" | "D#6" | "D#7" | "D#8" | "D#9" | "D#10" | "D#11" | "Dx0" | "Dx4" | "Dx-4" | "Dx3" | "Dx-3" | "Dx2" | "Dx-2" | "Dx1" | "Dx-1" | "Dx5" | "Dx6" | "Dx7" | "Dx8" | "Dx9" | "Dx10" | "Dx11" | "E0" | "E4" | "E-4" | "E3" | "E-3" | "E2" | "E-2" | "E1" | "E-1" | "E5" | "E6" | "E7" | "E8" | "E9" | "E10" | "E11" | "Ebb0" | "Ebb4" | "Ebb-4" | "Ebb3" | "Ebb-3" | "Ebb2" | "Ebb-2" | "Ebb1" | "Ebb-1" | "Ebb5" | "Ebb6" | "Ebb7" | "Ebb8" | "Ebb9" | "Ebb10" | "Ebb11" | "Eb0" | "Eb4" | "Eb-4" | "Eb3" | "Eb-3" | "Eb2" | "Eb-2" | "Eb1" | "Eb-1" | "Eb5" | "Eb6" | "Eb7" | "Eb8" | "Eb9" | "Eb10" | "Eb11" | "E#0" | "E#4" | "E#-4" | "E#3" | "E#-3" | "E#2" | "E#-2" | "E#1" | "E#-1" | "E#5" | "E#6" | "E#7" | "E#8" | "E#9" | "E#10" | "E#11" | "Ex0" | "Ex4" | "Ex-4" | "Ex3" | "Ex-3" | "Ex2" | "Ex-2" | "Ex1" | "Ex-1" | "Ex5" | "Ex6" | "Ex7" | "Ex8" | "Ex9" | "Ex10" | "Ex11" | "F0" | "F4" | "F-4" | "F3" | "F-3" | "F2" | "F-2" | "F1" | "F-1" | "F5" | "F6" | "F7" | "F8" | "F9" | "F10" | "F11" | "Fbb0" | "Fbb4" | "Fbb-4" | "Fbb3" | "Fbb-3" | "Fbb2" | "Fbb-2" | "Fbb1" | "Fbb-1" | "Fbb5" | "Fbb6" | "Fbb7" | "Fbb8" | "Fbb9" | "Fbb10" | "Fbb11" | "Fb0" | "Fb4" | "Fb-4" | "Fb3" | "Fb-3" | "Fb2" | "Fb-2" | "Fb1" | "Fb-1" | "Fb5" | "Fb6" | "Fb7" | "Fb8" | "Fb9" | "Fb10" | "Fb11" | "F#0" | "F#4" | "F#-4" | "F#3" | "F#-3" | "F#2" | "F#-2" | "F#1" | "F#-1" | "F#5" | "F#6" | "F#7" | "F#8" | "F#9" | "F#10" | "F#11" | "Fx0" | "Fx4" | "Fx-4" | "Fx3" | "Fx-3" | "Fx2" | "Fx-2" | "Fx1" | "Fx-1" | "Fx5" | "Fx6" | "Fx7" | "Fx8" | "Fx9" | "Fx10" | "Fx11" | "G0" | "G4" | "G-4" | "G3" | "G-3" | "G2" | "G-2" | "G1" | "G-1" | "G5" | "G6" | "G7" | "G8" | "G9" | "G10" | "G11" | "Gbb0" | "Gbb4" | "Gbb-4" | "Gbb3" | "Gbb-3" | "Gbb2" | "Gbb-2" | "Gbb1" | "Gbb-1" | "Gbb5" | "Gbb6" | "Gbb7" | "Gbb8" | "Gbb9" | "Gbb10" | "Gbb11" | "Gb0" | "Gb4" | "Gb-4" | "Gb3" | "Gb-3" | "Gb2" | "Gb-2" | "Gb1" | "Gb-1" | "Gb5" | "Gb6" | "Gb7" | "Gb8" | "Gb9" | "Gb10" | "Gb11" | "G#0" | "G#4" | "G#-4" | "G#3" | "G#-3" | "G#2" | "G#-2" | "G#1" | "G#-1" | "G#5" | "G#6" | "G#7" | "G#8" | "G#9" | "G#10" | "G#11" | "Gx0" | "Gx4" | "Gx-4" | "Gx3" | "Gx-3" | "Gx2" | "Gx-2" | "Gx1" | "Gx-1" | "Gx5" | "Gx6" | "Gx7" | "Gx8" | "Gx9" | "Gx10" | "Gx11" | "A0" | "A4" | "A-4" | "A3" | "A-3" | "A2" | "A-2" | "A1" | "A-1" | "A5" | "A6" | "A7" | "A8" | "A9" | "A10" | "A11" | "Abb0" | "Abb4" | "Abb-4" | "Abb3" | "Abb-3" | "Abb2" | "Abb-2" | "Abb1" | "Abb-1" | "Abb5" | "Abb6" | "Abb7" | "Abb8" | "Abb9" | "Abb10" | "Abb11" | "Ab0" | "Ab4" | "Ab-4" | "Ab3" | "Ab-3" | "Ab2" | "Ab-2" | "Ab1" | "Ab-1" | "Ab5" | "Ab6" | "Ab7" | "Ab8" | "Ab9" | "Ab10" | "Ab11" | "A#0" | "A#4" | "A#-4" | "A#3" | "A#-3" | "A#2" | "A#-2" | "A#1" | "A#-1" | "A#5" | "A#6" | "A#7" | "A#8" | "A#9" | "A#10" | "A#11" | "Ax0" | "Ax4" | "Ax-4" | "Ax3" | "Ax-3" | "Ax2" | "Ax-2" | "Ax1" | "Ax-1" | "Ax5" | "Ax6" | "Ax7" | "Ax8" | "Ax9" | "Ax10" | "Ax11" | "B0" | "B4" | "B-4" | "B3" | "B-3" | "B2" | "B-2" | "B1" | "B-1" | "B5" | "B6" | "B7" | "B8" | "B9" | "B10" | "B11" | "Bbb0" | "Bbb4" | "Bbb-4" | "Bbb3" | "Bbb-3" | "Bbb2" | "Bbb-2" | "Bbb1" | "Bbb-1" | "Bbb5" | "Bbb6" | "Bbb7" | "Bbb8" | "Bbb9" | "Bbb10" | "Bbb11" | "Bb0" | "Bb4" | "Bb-4" | "Bb3" | "Bb-3" | "Bb2" | "Bb-2" | "Bb1" | "Bb-1" | "Bb5" | "Bb6" | "Bb7" | "Bb8" | "Bb9" | "Bb10" | "Bb11" | "B#0" | "B#4" | "B#-4" | "B#3" | "B#-3" | "B#2" | "B#-2" | "B#1" | "B#-1" | "B#5" | "B#6" | "B#7" | "B#8" | "B#9" | "B#10" | "B#11" | "Bx0" | "Bx4" | "Bx-4" | "Bx3" | "Bx-3" | "Bx2" | "Bx-2" | "Bx1" | "Bx-1" | "Bx5" | "Bx6" | "Bx7" | "Bx8" | "Bx9" | "Bx10" | "Bx11"
Example
```
Tone.Frequency(69, "midi").toNote(); // "A4"
```
- Defined in Tone/core/type/Frequency.ts:144

toSamples

toSamples(): number
Return the time in samples

Returns number
Inherited from TimeClass.toSamples
- Defined in Tone/core/type/TimeBase.ts:348

toSeconds

toSeconds(): number
Return the duration of one cycle in seconds.

Returns number
Overrides TimeClass.toSeconds
- Defined in Tone/core/type/Frequency.ts:159

toString

toString(): string
Convert the class to a string

Returns string
Example
```
const osc = new Tone.Oscillator();
console.log(osc.toString());
```
Inherited from TimeClass.toString
- Defined in Tone/core/Tone.ts:106

toTicks

toTicks(): number
Return the duration of one cycle in ticks

Returns number
Overrides TimeClass.toTicks
- Defined in Tone/core/type/Frequency.ts:166

transpose

transpose(interval): FrequencyClass<number>
Transposes the frequency by the given number of semitones.
Parameters
- interval: number
Returns FrequencyClass<number>
A new transposed frequency
Example
```
Tone.Frequency("A4").transpose(3); // "C5"
```
- Defined in Tone/core/type/Frequency.ts:106

valueOf

valueOf(): Type
Evaluate the time value. Returns the time in seconds.

Returns Type
Inherited from TimeClass.valueOf
- Defined in Tone/core/type/TimeBase.ts:185

`Static` ftom

ftom(frequency): 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 101 | 102 | 103 | 104 | 105 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 | 124 | 125 | 126 | 127
Convert a frequency value to a MIDI note.
Parameters
- frequency: number
  The value to frequency value to convert.
Returns 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 101 | 102 | 103 | 104 | 105 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 | 124 | 125 | 126 | 127
- Defined in Tone/core/type/Frequency.ts:224

`Static` getDefaults

getDefaults(): BaseToneOptions
Returns all of the default options belonging to the class.

Returns BaseToneOptions
Inherited from TimeClass.getDefaults
- Defined in Tone/core/Tone.ts:38

`Static` mtof

mtof(midi): number
Convert a MIDI note to frequency value.
Parameters
- midi: 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 101 | 102 | 103 | 104 | 105 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 | 124 | 125 | 126 | 127
  The midi number to convert.
Returns number
The corresponding frequency value
- Defined in Tone/core/type/Frequency.ts:216

Class FrequencyClass<Type>

Example

Type Parameters

Hierarchy (view full)

Index

Constructors

Properties

Accessors

Methods

Constructors

constructor

Type Parameters

Parameters

Returns FrequencyClass<Type>

Properties

Readonly context

debug

Readonly defaultUnits

Readonly name

Static version

Accessors

disposed

Returns boolean

Static A4

Returns number

Parameters

Returns void

Methods

dispose

Returns this

fromType

Parameters

Returns this

harmonize

Parameters

Returns FrequencyClass<number>[]

Example

quantize

Parameters

Returns Type

Example

toBarsBeatsSixteenths

Returns `${number}:${number}:${number}`

toFrequency

Returns number

toMidi

Example

toMilliseconds

Returns number

toNotation

Returns Subdivision

Example

toNote

Example

toSamples

Returns number

toSeconds

Returns number

toString

Returns string

Example

toTicks

Returns number

transpose

Parameters

Returns FrequencyClass<number>

Example

valueOf

Returns Type

Static ftom

Parameters

Static getDefaults

Returns BaseToneOptions

Static mtof

Parameters

Returns number

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`Readonly` name

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`Static` A4

`Static` ftom

`Static` getDefaults

`Static` mtof