49 lines
1.4 KiB
Markdown
49 lines
1.4 KiB
Markdown
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# beatbox challenges
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Create sounds with variables.
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## Before we get started
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Complete the [beatbox](/microbit/lessons/beatbox/activity) activity and your code will look like this:
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```blocks
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let sound = music.noteFrequency(Note.A);
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input.onPinPressed(TouchPin.P1, () => {
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for (let i = 0; i < 4; i++) {
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sound = sound + 25
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music.playTone(music.noteFrequency(sound), music.beat(BeatFraction.Sixteenth));
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}
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})
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```
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**Challenge 1**
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Let's include a second sound `on pin pressed` *P2*. To do this, you need to add the same blocks as the banana keyboard activity. However, you must change alter `on pin pressed` from P1 to P2. Additionally, you must *decrease* the frequency of the variable "sound" by 25. Modify your code so that your code looks like this
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```blocks
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let sound = music.noteFrequency(Note.A);
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input.onPinPressed(TouchPin.P1, () => {
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for (let i = 0; i < 5; i++) {
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sound = sound + 25
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music.playTone(music.noteFrequency(sound), music.beat(BeatFraction.Sixteenth));
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}
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})
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input.onPinPressed(TouchPin.P2, () => {
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for (let i = 0; i < 5; i++) {
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sound = sound - 25
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music.playTone(music.noteFrequency(sound), music.beat(BeatFraction.Sixteenth));
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}
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})
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```
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* click *run* to see if the code works as expected.
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**Challenge 2**
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Finally, we want images to be displayed with sounds `on pin pressed`. Add `show LEDs` blocks under `on pin pressed` P1 and P2.
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