pxt-calliope/docs/reference/music/change-tempo-by.md

Change Tempo By

Makes the tempo (speed of a piece of music) faster or slower by the amount you say.

music.changeTempoBy(20)

~ hint

Simulator: This function only works on the @boardname@ and in some browsers.

~

Parameters

• bpm is a number that says how much to change the bpm (beats per minute, or number of beats in a minute of the music that the @boardname@ is playing).

Examples

This program makes the music faster by 12 bpm.

music.changeTempoBy(12)

This program makes the music slower by 12 bpm.

music.changeTempoBy(-12)

See also

play tone, ring tone