pxt-calliope/docs/reference/pins/analog-pitch.md
Sam El-Husseini e3975e65e5 pxt-microbit Accessibility PR ()
* Accessibility changes
2017-09-07 13:42:08 -07:00

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# Analog Pitch
Emits a Pulse With Modulation (PWM) signal to the pin ``P0``.
Use [analog set pitch pin](/reference/pins/analog-set-pitch-pin) to set the current pitch pin.
```sig
pins.analogPitch(440, 300)
```
## Parameters
* `frequency` : [Number](/types/number)
* `ms`: [Number](/types/number)
## Example
```blocks
pins.analogSetPitchPin("P0")
let frequency1 = 440
let duration = 1000
pins.analogSetPitchPin(AnalogPin.P1);
pins.analogPitch(frequency1, duration)
```
## Some common notes
* 440 = A4 on piano
* see [piano key frequencies ](https://en.wikipedia.org/wiki/Piano_key_frequencies) for more information
## See also
[@boardname@ pins](/device/pins), [analog set period](/reference/pins/analog-set-period), [analog set pitch pin](/reference/pins/analog-set-pitch-pin)