pxt-calliope/docs/reference/music/play-tone.md

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# Play Tone
Plays a music tone through pin ``P0`` for the given duration.
## Simulator
Simulation of this function is available in many, but not all browsers.
```sig
music.playTone(440, 120)
```
### Parameters
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* `frequency` : [Number](/reference/types/number) - the frequency of the note (in Herz)
* `ms`: [Number](/reference/types/number) - the duration of the note (milliseconds)
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## Example
```blocks
let freq = music.noteFrequency(Note.C)
music.playTone(freq, 1000)
```
### See also
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[rest](/reference/music/rest), [ring tone](/reference/music/ring-tone) , [tempo](/reference/music/tempo), [set tempo](/reference/music/set-tempo), [change tempo by](/reference/music/change-tempo-by)
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