ESP32_OSC_IMU/lib/M5Stack/examples/Basics/Speaker/Speaker.ino

#include <M5Stack.h>

#define NOTE_D0 -1
#define NOTE_D1 294
#define NOTE_D2 330
#define NOTE_D3 350
#define NOTE_D4 393
#define NOTE_D5 441
#define NOTE_D6 495
#define NOTE_D7 556

#define NOTE_DL1 147
#define NOTE_DL2 165
#define NOTE_DL3 175
#define NOTE_DL4 196
#define NOTE_DL5 221
#define NOTE_DL6 248
#define NOTE_DL7 278

#define NOTE_DH1 589
#define NOTE_DH2 661
#define NOTE_DH3 700
#define NOTE_DH4 786
#define NOTE_DH5 882
#define NOTE_DH6 990
#define NOTE_DH7 112


void setup() {
  // Initialize the M5Stack object
  M5.begin();
  
  /*
    Power chip connected to gpio21, gpio22, I2C device
    Set battery charging voltage and current
    If used battery, please call this function in your project
  */
  M5.Power.begin();

  M5.Lcd.printf("M5Stack Speaker test:\r\n");
}

void loop() {
  if(M5.BtnA.wasPressed()) {
    M5.Lcd.printf("A wasPressed \r\n");
    M5.Speaker.beep(); //beep
  }

  if(M5.BtnB.wasPressed())
  {
    M5.Lcd.printf("B wasPressed \r\n");
    M5.Speaker.tone(NOTE_DH2, 200); //frequency 3000, with a duration of 200ms
  }

  M5.update();
}