pxt-calliope/olddocs/lessons/classic-beatbox/challenges.md

beatbox challenges

Create sounds with variables.

Before we get started

Complete the beatbox activity and your code will look like this:

let sound = music.noteFrequency(Note.A);
input.onPinPressed(TouchPin.P1, () => {
    for (let i = 0; i < 4; i++) {
        sound = sound + 25
         music.playTone(music.noteFrequency(sound), music.beat(BeatFraction.Sixteenth));
    }
})

Challenge 1

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

let sound = music.noteFrequency(Note.A);
input.onPinPressed(TouchPin.P1, () => {
    for (let i = 0; i < 5; i++) {
        sound = sound + 25
        music.playTone(music.noteFrequency(sound), music.beat(BeatFraction.Sixteenth));
    }

})
input.onPinPressed(TouchPin.P2, () => {
    for (let i = 0; i < 5; i++) {
        sound = sound - 25
        music.playTone(music.noteFrequency(sound), music.beat(BeatFraction.Sixteenth));
    }

})

• click run to see if the code works as expected.

Challenge 2

Finally, we want images to be displayed with sounds on pin pressed. Add show LEDs blocks under on pin pressed P1 and P2.