10. Audio: built in sounds V2

10.1. Expressive sounds V2

The built-in expressive sounds can be called using audio.play(Sound.SOUNDNAME) where SOUNDNAME is replaced with the name of a sound in capital letters.
e.g. audio.play(Sound.GIGGLE)

The built in sounds are

  • Sound.GIGGLE

  • Sound.HAPPY

  • Sound.HELLO

  • Sound.MYSTERIOUS

  • Sound.SAD

  • Sound.SLIDE

  • Sound.SOARING

  • Sound.SPRING

  • Sound.TWINKLE

  • Sound.YAWN

from microbit import *
import audio

audio.play(Sound.GIGGLE)
The code below uses a for-loop to loop through each sound in the sound_list and play each sound.
from microbit import *
import audio

sound_list = [Sound.GIGGLE, Sound.TWINKLE]
for sound in sound_list:
    audio.play(sound)

Tasks

  1. Play the HELLO sound and scroll “hello” using wait=True for both.

  2. Play the HELLO sound and scroll “hello” using wait=False for the sound and wait=True for the text.

Play the HELLO sound and scroll “hello” using wait=True for both.

from microbit import *
import audio

while True:
    audio.play(Sound.HELLO, wait=True)
    display.scroll("hello", wait=True)
    sleep(1000)

Play the HELLO sound and scroll “hello” using wait=False for the sound and wait=True for the text.

from microbit import *
import audio

while True:
    audio.play(Sound.HELLO, wait=False)
    display.scroll("hello", wait=True)
    sleep(1000)

10.2. All Built in sounds

The code below plays all the built-in sounds.
the A-button can be pressed to exit the for-loop then the while-loop using break.
Pressing the reset button on the back of the microbit will restart the code.
from microbit import *
import audio

built_in_sounds = [
    Sound.GIGGLE,
    Sound.HAPPY,
    Sound.HELLO,
    Sound.MYSTERIOUS,
    Sound.SAD,
    Sound.SLIDE,
    Sound.SOARING,
    Sound.SPRING,
    Sound.TWINKLE,
    Sound.YAWN,
]

while True:
    for sound in built_in_sounds:
        if button_a.was_pressed():
            break
        audio.play(sound)
        sleep(500)
    if button_a.is_pressed():
        break

Tasks

  1. Play any 3 built-in sounds using a list, separating them with a 1 second pause.

  2. Use the choice function to randomly pick a built-in sound from a sound list. See: https://www.w3schools.com/python/ref_random_choice.asp. Use button pressing to break out of the while-loop to stop playing sounds.

Play any 3 built-in sounds using a list, separating them with a 1 second pause.

from microbit import *
import audio

sound_list = [Sound.SAD, Sound.HAPPY, Sound.YAWN]
for sound in sound_list:
    audio.play(sound)
    sleep(1000)

Use the choice function to randomly pick a built-in sound from a sound list. See: https://www.w3schools.com/python/ref_random_choice.asp. Use button pressing to break out of the while-loop to stop playing sounds.

from microbit import *
import audio
from random import choice as rand_choice

sound_list = [Sound.SAD, Sound.HAPPY, Sound.YAWN]

while True:
    audio.play(rand_choice(sound_list))
    sleep(1000)
    if button_a.is_pressed():
        break

10.3. Sound name with sound

The advanced code below uses replace methods on the string version of the sound to get the simple name of the sound for scrolling.
The sound playing is started first, using the non-blocking form with wait=False.
The sound name is scrolled using the blocking form with wait=True, so that the the next sound is not played till the scrolling has completed.
from microbit import *
import audio

sound_list = [Sound.GIGGLE, Sound.TWINKLE]
for sound in sound_list:
    # Remove 'Sound(' from the start and ')' from the end
    sound_name = str(sound).replace("Sound('", '').replace("')", '')
    audio.play(sound, wait=False)
    display.scroll(sound_name, delay=80, wait=True)

Tasks

  1. Modify the code above to use all built in sounds.

Modify the code above to use all built in sounds.

from microbit import *
import audio

sound_list = [
    Sound.GIGGLE,
    Sound.HAPPY,
    Sound.HELLO,
    Sound.MYSTERIOUS,
    Sound.SAD,
    Sound.SLIDE,
    Sound.SOARING,
    Sound.SPRING,
    Sound.TWINKLE,
    Sound.YAWN,
]

for sound in sound_list:
    # Remove 'Sound(' from the start and ')' from the end
    sound_name = str(sound).replace("Sound('", '').replace("')", '')
    audio.play(sound, wait=False)
    display.scroll(sound_name, delay=80, wait=True)

10.4. Built in sounds and images

The following code uses a dictionary to associate sounds and images.
It then displays the image and plays the sound.
In the code for emotion, attributes in emotions.items():, ‘emotion, attributes’ follow the pattern ‘key, value’, where emotion is the key and attribute is the value for that key.
‘happy’ is the first emotion (key). Its value, attribute, is a nested dictionary with keys ‘sound’ and ‘image’.
from microbit import *
import audio

# Define the sounds and images for happy and sad emotions
emotions = {
    'happy': {
        'sound': Sound.HAPPY,
        'image': Image.HAPPY
    },
    'sad': {
        'sound': Sound.SAD,
        'image': Image.SAD
    }
}

while True:
    for emotion, attributes in emotions.items():
        # Display the image
        display.show(attributes['image'])
        # Play the sound
        audio.play(attributes['sound'], wait=True)
        display.clear()
        sleep(1000)

Tasks

  1. Modify the emotions dictionary to associate 2 other images with 2 other built in sounds. Use button pressing to utilize each one separately. Use a def block to do the image display and sound playing.

Modify the emotions dictionary to associate 2 other images with 2 other built in sounds. Use button pressing to utilize each one separately. Use a def block to do the image display and sound playing.

from microbit import *
import audio


emotions = {
    'alert': {
        'sound': Sound.TWINKLE,
        'image': Image.DIAMOND
    },
    'tired': {
        'sound': Sound.YAWN,
        'image': Image.ASLEEP
    }
}

def do_emotion(emotion):
    display.show(emotions[emotion]['image'])
        # Play the sound
    audio.play(emotions[emotion]['sound'], wait=True)
    display.clear()

while True:
    if button_a.is_pressed():
        do_emotion('alert')
    elif button_b.is_pressed():
        do_emotion('tired')
    sleep(100)