pimoroni-pico/micropython/examples/pico_explorer/noise.py

# This example shows you how you can use Pico Explorer's onboard buzzer as a speaker to play different notes and string them together into a bleepy tune.
# It uses code written by Avram Piltch - check out his Tom's Hardware article! https://www.tomshardware.com/uk/how-to/buzzer-music-raspberry-pi-pico
# You'll need to connect a jumper wire between GPO and AUDIO on the Explorer Base to hear noise.

import utime
import picoexplorer as explorer

# Set up and initialise Pico Explorer
buf = bytearray(explorer.get_width() * explorer.get_height() * 2)
explorer.init(buf)

# tells Pico Explorer which pin you'll be using for noise
explorer.set_audio_pin(0)

# this handy list converts notes into frequencies, which you can use with the explorer.set_tone function
tones = {
"B0": 31,
"C1": 33,
"CS1": 35,
"D1": 37,
"DS1": 39,
"E1": 41,
"F1": 44,
"FS1": 46,
"G1": 49,
"GS1": 52,
"A1": 55,
"AS1": 58,
"B1": 62,
"C2": 65,
"CS2": 69,
"D2": 73,
"DS2": 78,
"E2": 82,
"F2": 87,
"FS2": 93,
"G2": 98,
"GS2": 104,
"A2": 110,
"AS2": 117,
"B2": 123,
"C3": 131,
"CS3": 139,
"D3": 147,
"DS3": 156,
"E3": 165,
"F3": 175,
"FS3": 185,
"G3": 196,
"GS3": 208,
"A3": 220,
"AS3": 233,
"B3": 247,
"C4": 262,
"CS4": 277,
"D4": 294,
"DS4": 311,
"E4": 330,
"F4": 349,
"FS4": 370,
"G4": 392,
"GS4": 415,
"A4": 440,
"AS4": 466,
"B4": 494,
"C5": 523,
"CS5": 554,
"D5": 587,
"DS5": 622,
"E5": 659,
"F5": 698,
"FS5": 740,
"G5": 784,
"GS5": 831,
"A5": 880,
"AS5": 932,
"B5": 988,
"C6": 1047,
"CS6": 1109,
"D6": 1175,
"DS6": 1245,
"E6": 1319,
"F6": 1397,
"FS6": 1480,
"G6": 1568,
"GS6": 1661,
"A6": 1760,
"AS6": 1865,
"B6": 1976,
"C7": 2093,
"CS7": 2217,
"D7": 2349,
"DS7": 2489,
"E7": 2637,
"F7": 2794,
"FS7": 2960,
"G7": 3136,
"GS7": 3322,
"A7": 3520,
"AS7": 3729,
"B7": 3951,
"C8": 4186,
"CS8": 4435,
"D8": 4699,
"DS8": 4978
}

# put the notes for your song in here!
song = ["F6","F6","E6","F6","F5","P","F5","P","C6","AS5","A5","C6","F6","P","F6","P","G6","FS6","G6","G5","P","G5","P","G6","F6","E6","D6","C6","P","C6","P","D6","E6","F6","E6","D6","C6","D6","C6","AS5","A5","AS5","A5","G5","F5","G5","F5","E5","D5","C5","D5","E5","F5","G5","AS5","A5","G5","A5","F5","P","F5"]

def clear():                        # this function clears Pico Explorer's screen to black
    explorer.set_pen(0,0,0)
    explorer.clear()
    explorer.update()
    
def playtone(frequency):            # this function tells your program how to make noise
    explorer.set_tone(frequency)

def bequiet():                      # this function tells your program how not to make noise
    explorer.set_tone(-1)

def playsong(song):                 # this function plays your song
    a = 0                           # this variable keeps track of the visualiser bars
    for i in range(len(song)):
        if (song[i] == "P"):
            bequiet()
        else:
            playtone(tones[song[i]])
            explorer.set_pen(0, 255, 0)  # switch to green pen
            explorer.rectangle(a, 240 - (int((tones[song[i]])/21)), 5, 240) # draw a green bar corresponding to the frequency of the note
            a += 7
        if a >= 240:  # clears the screen if the green bars reach the right hand edge
            clear()
            a = 0
        explorer.update()
        utime.sleep(0.15)  # change this number if you want to alter how long the notes play for
    bequiet()

clear()
playsong(song)
clear()