How to record and play the audio sample

Using Arduino Audio
1

Hello Everyone,
I am working with INMP441 for recording the audio and speaker with max98357A to play the audio samples. I don't want to use the sd card. Here is the code:

#include <driver/i2s.h>

#define I2S_PORT_MIC I2S_NUM_0      // Microphone I2S port
#define I2S_PORT_SPEAKER I2S_NUM_1  // Speaker I2S port

// Pin definitions for the MAX98357A (speaker output)
#define I2S_SPEAKER_BCLK 26
#define I2S_SPEAKER_LRCLK 25
#define I2S_SPEAKER_DOUT 22

// Connections for the INMP441 microphone
#define I2S_MIC_BCLK 33
#define I2S_MIC_WS 19
#define I2S_MIC_DOUT 32

// Define input buffer length
#define bufferLen 64
int16_t sBuffer[bufferLen];

void i2s_install_microphone() {
  // I2S configuration for the microphone
  const i2s_config_t i2s_config_mic = {
    .mode = i2s_mode_t(I2S_MODE_MASTER | I2S_MODE_RX),
    .sample_rate = 44100,                              // Sampling rate for mic
    .bits_per_sample = i2s_bits_per_sample_t(16),      // 16-bit per sample
    .channel_format = I2S_CHANNEL_FMT_ONLY_LEFT,       // Mono input
    .communication_format = i2s_comm_format_t(I2S_COMM_FORMAT_STAND_I2S),
    .intr_alloc_flags = 0,
    .dma_buf_count = 8,
    .dma_buf_len = bufferLen,
    .use_apll = false
  };

  i2s_driver_install(I2S_PORT_MIC, &i2s_config_mic, 0, NULL);
  
  // Pin configuration for the INMP441 microphone
  const i2s_pin_config_t pin_config_mic = {
    .bck_io_num = I2S_MIC_BCLK,
    .ws_io_num = I2S_MIC_WS,
    .data_out_num = -1,        // No data output for the mic
    .data_in_num = I2S_MIC_DOUT
  };
  i2s_set_pin(I2S_PORT_MIC, &pin_config_mic);
}

void i2s_install_speaker() {
  // I2S configuration for the speaker (MAX98357A)
  const i2s_config_t i2s_config_speaker = {
    .mode = i2s_mode_t(I2S_MODE_MASTER | I2S_MODE_TX), // Transmit mode
    .sample_rate = 44100,                              // Same sample rate
    .bits_per_sample = i2s_bits_per_sample_t(16),      // 16-bit per sample
    .channel_format = I2S_CHANNEL_FMT_ONLY_LEFT,       // Mono output
    .communication_format = i2s_comm_format_t(I2S_COMM_FORMAT_STAND_I2S),
    .intr_alloc_flags = 0,
    .dma_buf_count = 8,
    .dma_buf_len = bufferLen,
    .use_apll = false
  };

  i2s_driver_install(I2S_PORT_SPEAKER, &i2s_config_speaker, 0, NULL);

  // Pin configuration for the MAX98357A speaker output
  const i2s_pin_config_t pin_config_speaker = {
    .bck_io_num = I2S_SPEAKER_BCLK,
    .ws_io_num = I2S_SPEAKER_LRCLK,
    .data_out_num = I2S_SPEAKER_DOUT,
    .data_in_num = -1          // No data input for the speaker
  };
  i2s_set_pin(I2S_PORT_SPEAKER, &pin_config_speaker);
}

void setup() {
  Serial.begin(115200);

  // Install and configure I2S for microphone
  i2s_install_microphone();
  i2s_start(I2S_PORT_MIC);

  // Install and configure I2S for speaker (MAX98357A)
  i2s_install_speaker();
  i2s_start(I2S_PORT_SPEAKER);

  delay(500);
}

void loop() {
  size_t bytesIn = 0;

  // Capture audio data from the microphone
  esp_err_t result = i2s_read(I2S_PORT_MIC, &sBuffer, bufferLen * sizeof(int16_t), &bytesIn, portMAX_DELAY);

  if (result == ESP_OK && bytesIn > 0) {
    // Play the captured audio using the MAX98357A
    size_t bytesWritten = 0;
    i2s_write(I2S_PORT_SPEAKER, &sBuffer, bytesIn, &bytesWritten, portMAX_DELAY);
    
    // Optionally print the data to serial (for debugging purposes)
    for (int i = 0; i < bytesIn / sizeof(int16_t); ++i) {
      Serial.print("Sample ");
      Serial.print(i);
      Serial.print(": ");
      Serial.println(sBuffer[i]);
    }
  }
}

Result of the code:
Noisy output