Happy to help, but all credit goes to :

https://www.hackster.io/tommyho/arduino-web-radio-player-c4cb23

// m5StreamTest Version 2020.12b (Source/Buffer Tester)
// Board: M5StackCore2 (esp32)
// Author: tommyho510@gmail.com
// Required: Arduino library ESP8266Audio 1.60
//

All I did was to work through his examples, and a few other online examples to find the right audio settings for the Core2.

Then add a few items to the GUI for battery and track information.

Hopefully I'll add some of my wish list items as time permits but it seems like a fun project.

// March 23, 2021
// Made changes to the Example Core2 Web Radio Player from:
// https://www.hackster.io/tommyho/arduino-web-radio-player-c4cb23

// Wish List: (NOT DONE YET)
// Nicer Fonts
// Use 2nd CPU Core to handle GUI and button's so we keep it responsive
// Add bluetooth output to Bluetooth speakers / headest
// Get more information from the stream, Album art, etc.
// Get track length and have a progress bar for the track
// Have an interface to select WiFi network and enter password
// -- Store password in EEPROM
// Better mehod of selecting stations
// ? Maybe web interface for setting up station lists?
//
// m5StreamTest Version 2020.12b (Source/Buffer Tester)
// Board: M5StackCore2 (esp32)
// Author: tommyho510@gmail.com
// Required: Arduino library ESP8266Audio 1.60
//

#include <M5Core2.h>
#include <driver/i2s.h>
#include <WiFi.h>
#include <AudioFileSourceICYStream.h>
#include <AudioFileSource.h>
#include <AudioFileSourceBuffer.h>
#include <AudioFileSourceSPIRAMBuffer.h>
#include <AudioGeneratorMP3.h>
#include <AudioOutputI2S.h>
#include <spiram-fast.h>

// Enter your WiFi, Station, button settings here:
const char *SSID = "ENTER_SSID_HERE";
const char *PASSWORD = "ENTER_WIFI_PASSWORD_HERE";

const int bufferSize = 128 * 1024; // buffer size in byte

// http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd
// Charlie FM in Portland Oregon
//http://24083.live.streamtheworld.com:80/KYCHFM_SC
//
//Removed these from the list:
// {"Mega Shuffle", "http://jenny.torontocast.com:8134/stream"},
// {"Way Up Radio", "http://188.165.212.154:8478/stream"},
// {"Asia Dream", "https://igor.torontocast.com:1025/;.-mp3"},
// {"KPop Way Radio", "http://streamer.radio.co/s06b196587/listen"},
// {"SomaFM", "http://ice2.somafm.com/christmas-128-mp3"}
//"http://icecast.thisisdax.com/CapitalEdinburghMP3",
//"https://prod-34-82-94-246.wostreaming.net/ppm-jazz24mp3-ibc1",
//"http://sj32.hnux.com/stream?type=http&nocache=3104",
//"http://sl32.hnux.com/stream?type=http&nocache=1257",
//"http://media-ice.musicradio.com:80/ClassicFMMP3",
//"http://naxos.cdnstream.com:80/1255_128",
//"https://v7player.wostreaming.net/854"

const int stations = 7;// Change Number here if you add feeds!
char * stationList[stations][3] = {
{"Charlie_FM", "http://24083.live.streamtheworld.com:80/KYCHFM_SC", "good"},
{"MAXXED Out", "http://149.56.195.94:8015/steam", "good"},
{"Orig. Top 40", "http://ais-edge09-live365-dal02.cdnstream.com/a25710", "good"},
{"Smooth Jazz", "http://sj32.hnux.com/stream?type=http&nocache=3104", "good"},
{"Smooth Lounge", "http://sl32.hnux.com/stream?type=http&nocache=1257", "good"},
{"Classic FM", "http://media-ice.musicradio.com:80/ClassicFMMP3", "good"},
{"Lite Favorites", "http://naxos.cdnstream.com:80/1255_128", "good"}
};

float audioGain = 1.0;
float gainfactor = 0.08;
int currentStationNumber = 0;
unsigned long disUpdate = millis();

AudioGeneratorMP3 *mp3;
AudioFileSourceICYStream *filemp3;
AudioFileSourceBuffer *buffmp3;
AudioOutputI2S *out, *outmp3;

void displayWiFiInformation() {
M5.Lcd.setCursor(0, 172, 2);
M5.Lcd.setTextColor(TFT_WHITE, TFT_BLACK);
M5.Lcd.setTextSize(1);
M5.Lcd.println("WiFi Network: " + String(SSID));
M5.Lcd.print( "IP Address : ");
M5.Lcd.println(WiFi.localIP());
}

void initwifi() {
WiFi.disconnect();
WiFi.softAPdisconnect(true);
WiFi.mode(WIFI_STA);
WiFi.begin(SSID, PASSWORD);
// Try forever
int i = 0;
while (WiFi.status() != WL_CONNECTED) {
Serial.print("STATUS(Connecting to WiFi) ");
delay(1000);
i = i + 1;
if (i > 10) {
ESP.restart();
}
}
Serial.println("\nWiFi Connected!\n");
}

String getValue(String data, char separator, int index){
int found = 0;
int strIndex[] = {0,-1};
int maxIndex = data.length() -1;

for (int i = 0; i <= maxIndex && found <= index; i++){
if (data.charAt(i) == separator || i == maxIndex){
found++;
strIndex[0] = strIndex[1] + 1;
strIndex[1] = (i == maxIndex) ? i+1 : i;
}
}
return found > index ? data.substring(strIndex[0], strIndex[1]) : "";
}

// Calculate Battery Usable range (3.2 to 4.0 Volts)
void displayBattery() {
int maxVolts = 400; // Battery Max volts * 100
int minVolts = 320; // Battery Min Volts * 100
M5.Lcd.setCursor(0, 155, 2);
M5.Lcd.setTextColor(TFT_WHITE, TFT_BLACK);
M5.Lcd.setTextSize(1);
M5.Lcd.printf("Battery: %.2f ", M5.Axp.GetBatVoltage());
int batt = map(M5.Axp.GetBatVoltage()*100, minVolts, maxVolts, 0 , 10000) / 100.0;

// Draw Battery bar(s) on the right side of the screen
uint16_t clr = GREEN;
for(int x = 9; x >= 0; x--){
if (x < 6) clr = YELLOW;
if (x < 3) clr = RED;
M5.Lcd.fillRoundRect(315, (216-(x24)), 5, 21, 2, (batt>(x10))?clr:BLACK);
}
M5.Lcd.setCursor(180, 172, 2);
M5.Lcd.setTextColor(TFT_WHITE, TFT_BLACK);
M5.Lcd.setTextSize(1);
M5.Lcd.print("WiFi Signal: ");
M5.Lcd.print(WiFi.RSSI());
}

// Remove the Track information (While changing stations)
void clearTrack() {
M5.Lcd.fillRect(0,63,310,40, BLACK); // Clear the area of old data
M5.Lcd.drawRect(0,64,310,37, BLUE); // Draw a box around the Track Information
}

// Called when a metadata event occurs (i.e. an ID3 tag, an ICY block, etc.
void MDCallback(void *cbData, const char *type, bool isUnicode, const char *string) {
const char *ptr = reinterpret_cast<const char *>(cbData);
(void) isUnicode; // Punt this ball for now
// Note that the type and string may be in PROGMEM, so copy them to RAM for printf
char s1[32], s2[64];
strncpy_P(s1, type, sizeof(s1));
s1[sizeof(s1) - 1] = 0;
strncpy_P(s2, string, sizeof(s2));
s2[sizeof(s2) - 1] = 0;

String band = getValue(s2, '-', 0);
band.trim();
String track = getValue(s2, '-', 1);
track.trim();

Serial.printf("Band: %s Track: %s \n", band.c_str(), track.c_str());
Serial.printf("METADATA(%s) '%s' = '%s'\n", ptr, s1, s2);
M5.Lcd.setTextSize(1);
M5.Lcd.setCursor(5, 65, 2);
clearTrack();
M5.Lcd.print(band);
M5.Lcd.setCursor(5, 82, 2);
M5.Lcd.print(track);
Serial.flush();
displayBattery(); // Make sure the new song information does not overwrite the battery
}

// Called when there's a warning or error (like a buffer underflow or decode hiccup)
void StatusCallback(void *cbData, int code, const char *string) {
const char *ptr = reinterpret_cast<const char *>(cbData);
// Note that the string may be in PROGMEM, so copy it to RAM for printf
char s1[64];
strncpy_P(s1, string, sizeof(s1));
s1[sizeof(s1) - 1] = 0;
Serial.printf("STATUS(%s) '%d' = '%s'\n", ptr, code, s1);
Serial.flush();
}

void stopPlaying() {
Serial.printf("Stopping MP3...\n");
if (mp3) {
mp3->stop();
delete mp3;
mp3 = NULL;
}
Serial.printf("MP3 Stopped, Stopping Buffer...\n");
if (buffmp3) {
buffmp3->close();
delete buffmp3;
buffmp3 = NULL;
}
Serial.printf("Buffer stopped... Stopping File ...\n");
if (filemp3) {
filemp3->close();
delete filemp3;
filemp3 = NULL;
}
if (outmp3) {
// filemp3->close();
delete outmp3;
outmp3 = NULL;
}

Serial.printf("STATUS(Stopped)\n");
Serial.flush();
}

// Update the Station Label
void updateStation(String message) {
M5.Lcd.fillRect(0,30,315,30,BLACK); // Clear out other information on the line
M5.Lcd.setCursor(0, 30, 2);
M5.Lcd.setTextColor(TFT_WHITE, TFT_BLACK);
M5.Lcd.setTextSize(2);
M5.Lcd.println(message);
}

// Identify buttons at the bottom of screen
void drawButtons() {
M5.Lcd.setCursor(5, 210, 2);
M5.Lcd.setTextColor(TFT_BLACK, TFT_YELLOW);
M5.Lcd.setTextSize(2);
M5.Lcd.println(" Vol Station Mute");
M5.Lcd.setTextColor(TFT_WHITE, TFT_BLACK);
M5.Lcd.setTextSize(1);
}

// Change to the next station
void changeStation() {
updateStation("Changing..Wait..");
currentStationNumber++;
if ( stationList[currentStationNumber][2] == "bad") currentStationNumber++; // Skip feeds marked as bad
if (currentStationNumber >= stations) currentStationNumber = 0;
Serial.printf("\n******** Changing to channel number: %i\n", currentStationNumber);
}

// Change the volume level
void changeVolume() {
audioGain += 1.0;
if (audioGain > 10.0) {
audioGain = 1.0;
}
if (audioGain < 0.0) {
audioGain = 0.0;
}
int xtPos = 260; // X Position for the Volume indication
outmp3->SetGain(audioGain * gainfactor);
M5.Lcd.fillRect(xtPos, 0, 320-xtPos-5, 21, BLACK);
uint16_t clr = GREEN;
if (audioGain > 9) clr = RED;
else if (audioGain > 6) clr = BLUE;
M5.Lcd.fillTriangle(xtPos, 20, xtPos + (5 * audioGain), 20, xtPos + (5 * audioGain), 20 - (2 * audioGain), clr);
}

void playMP3() {
outmp3 = new AudioOutputI2S(0, 0); // Output to builtInDAC
outmp3->SetPinout(12, 0, 2);
outmp3->SetOutputModeMono(true);
outmp3->SetGain(audioGain * gainfactor);
filemp3 = new AudioFileSourceICYStream(stationList[currentStationNumber][1]);
filemp3->RegisterMetadataCB(MDCallback, (void*)"ICY");
buffmp3 = new AudioFileSourceBuffer(filemp3, bufferSize);
buffmp3->RegisterStatusCB(StatusCallback, (void*)"buffer");
mp3 = new AudioGeneratorMP3();
mp3->RegisterStatusCB(StatusCallback, (void*)"mp3");
mp3->begin(buffmp3, outmp3);
Serial.printf("STATUS(URL) %s %s\n", stationList[currentStationNumber][0], stationList[currentStationNumber][1]);
Serial.flush();
updateStation(String(stationList[currentStationNumber][0]));
}

void loopMP3() {
if (mp3 != NULL) { // To avoid crash while changing stations
if (mp3->isRunning()) {
if (!mp3->loop()) mp3->stop();
} else {
Serial.printf("Status(Stream) Stopped \n");
stationList[currentStationNumber][2] = "bad"; // Mark feed as bad if it won't play
clearTrack();
changeStation();
// stopPlaying();
delay(1000);
playMP3();
}
}
}

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

M5.begin();
M5.Axp.SetSpkEnable(true);
// M5.Lcd.setRotation(3);
M5.Lcd.fillScreen(BLACK);
M5.Lcd.setTextSize(2);
// M5.Lcd.setFreeFont(TT1);
// M5.Lcd.setFreeFont(FF33);
M5.Lcd.setTextColor(TFT_GREEN, TFT_BLACK);
M5.Lcd.println("Core2 Web Radio");
M5.Lcd.setTextColor(TFT_WHITE, TFT_BLACK);
M5.Lcd.setTextWrap(false);

initwifi();
delay(500);
drawButtons();
playMP3();
changeVolume(); // To update Volume setting and graphic
displayWiFiInformation();
// Serial.printf("Battery Voltage: %f \n", M5.Axp.GetBatVoltage());
}

void loop() {
loopMP3();
M5.update();

if (m5.BtnA.wasPressed()) { //Change Volume(Button A)
changeVolume();
}

if (m5.BtnB.wasPressed()) { //Change Station(Button B)
clearTrack();
changeStation();
stopPlaying();
playMP3();
}

if (m5.BtnC.wasPressed()) { //Mute (Button C)
audioGain = -1.0;
changeVolume();
}

if (disUpdate + 1000 < millis()) { // Update the battery voltage
disUpdate = millis();
displayBattery();
}
}

Thx, will give it a try later ;-)

//   March 23, 2021
//   Made changes to the Example Core2 Web Radio Player from:
//   https://www.hackster.io/tommyho/arduino-web-radio-player-c4cb23

//    Wish List: (NOT DONE YET)
//    Nicer Fonts
//    Use 2nd CPU Core to handle GUI and button's so we keep it responsive
//    Add bluetooth output to Bluetooth speakers / headest
//    Get more information from the stream,  Album art, etc.
//    Get track length and have a progress bar for the track
//    Have an interface to select WiFi network and enter password
//    -- Store password in EEPROM
//    Better mehod of selecting stations
//    ? Maybe web interface for setting up station lists?
//
//  m5StreamTest Version 2020.12b (Source/Buffer Tester)
//  Board: M5StackCore2 (esp32)
//  Author: tommyho510@gmail.com
//  Required: Arduino library ESP8266Audio 1.60
//

#include <M5Core2.h>
#include <driver/i2s.h>
#include <WiFi.h>
#include <AudioFileSourceICYStream.h>
#include <AudioFileSource.h>
#include <AudioFileSourceBuffer.h>
#include <AudioFileSourceSPIRAMBuffer.h>
#include <AudioGeneratorMP3.h>
#include <AudioOutputI2S.h>
#include <spiram-fast.h>


// Enter your WiFi, Station, button settings here:
const char *SSID = "ENTER_SSID_HERE";
const char *PASSWORD = "ENTER_WIFI_PASSWORD_HERE";

const int bufferSize = 128 * 1024; // buffer size in byte


// http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd
// Charlie FM in Portland Oregon
//http://24083.live.streamtheworld.com:80/KYCHFM_SC
//
//Removed these from the list:
//  {"Mega Shuffle", "http://jenny.torontocast.com:8134/stream"},
//  {"Way Up Radio", "http://188.165.212.154:8478/stream"},
//  {"Asia Dream", "https://igor.torontocast.com:1025/;.-mp3"},
//  {"KPop Way Radio", "http://streamer.radio.co/s06b196587/listen"},
//  {"SomaFM", "http://ice2.somafm.com/christmas-128-mp3"}
//"http://icecast.thisisdax.com/CapitalEdinburghMP3",
//"https://prod-34-82-94-246.wostreaming.net/ppm-jazz24mp3-ibc1",
//"http://sj32.hnux.com/stream?type=http&nocache=3104",
//"http://sl32.hnux.com/stream?type=http&nocache=1257",
//"http://media-ice.musicradio.com:80/ClassicFMMP3",
//"http://naxos.cdnstream.com:80/1255_128",
//"https://v7player.wostreaming.net/854"

const int stations = 7;// Change Number here if you add feeds!
char * stationList[stations][3] = {
  {"Charlie_FM", "http://24083.live.streamtheworld.com:80/KYCHFM_SC", "good"},
  {"MAXXED Out", "http://149.56.195.94:8015/steam", "good"},
  {"Orig. Top 40", "http://ais-edge09-live365-dal02.cdnstream.com/a25710", "good"},
  {"Smooth Jazz", "http://sj32.hnux.com/stream?type=http&nocache=3104", "good"},
  {"Smooth Lounge", "http://sl32.hnux.com/stream?type=http&nocache=1257", "good"},
  {"Classic FM", "http://media-ice.musicradio.com:80/ClassicFMMP3", "good"},
  {"Lite Favorites", "http://naxos.cdnstream.com:80/1255_128", "good"}
};

float audioGain = 1.0;
float gainfactor = 0.08;
int currentStationNumber = 0;
unsigned long disUpdate = millis();

AudioGeneratorMP3 *mp3;
AudioFileSourceICYStream *filemp3;
AudioFileSourceBuffer *buffmp3;
AudioOutputI2S *out, *outmp3;


void displayWiFiInformation() {
  M5.Lcd.setCursor(0, 172, 2);
  M5.Lcd.setTextColor(TFT_WHITE, TFT_BLACK);
  M5.Lcd.setTextSize(1);
  M5.Lcd.println("WiFi Network:  " + String(SSID));
  M5.Lcd.print(  "IP Address   :  ");
  M5.Lcd.println(WiFi.localIP());
}

void initwifi() {
  WiFi.disconnect();
  WiFi.softAPdisconnect(true);
  WiFi.mode(WIFI_STA);
  WiFi.begin(SSID, PASSWORD);
  // Try forever
  int i = 0;
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print("STATUS(Connecting to WiFi) ");
    delay(1000);
    i = i + 1;
    if (i > 10) {
      ESP.restart();
    }
  }
  Serial.println("\nWiFi Connected!\n");
}


String getValue(String data, char separator, int index){
  int found = 0;
  int strIndex[] = {0,-1};
  int maxIndex = data.length() -1;

  for (int i = 0; i <= maxIndex && found <= index; i++){
    if (data.charAt(i) == separator || i == maxIndex){
      found++;
      strIndex[0] = strIndex[1] + 1;
      strIndex[1] = (i == maxIndex) ? i+1 : i;
    }
  }
  return found > index ? data.substring(strIndex[0], strIndex[1]) : "";
}


// Calculate Battery Usable range  (3.2 to 4.0 Volts)
void displayBattery() {
  int maxVolts = 400;  // Battery Max volts * 100
  int minVolts = 320;  // Battery Min Volts * 100
  M5.Lcd.setCursor(0, 155, 2);
  M5.Lcd.setTextColor(TFT_WHITE, TFT_BLACK);
  M5.Lcd.setTextSize(1);
  M5.Lcd.printf("Battery:  %.2f  ", M5.Axp.GetBatVoltage());
  int batt = map(M5.Axp.GetBatVoltage()*100, minVolts, maxVolts, 0 , 10000) / 100.0;

  // Draw Battery bar(s) on the right side of the screen
  uint16_t clr = GREEN;  
  for(int x = 9; x >= 0; x--){
    if (x < 6) clr = YELLOW;
    if (x < 3) clr = RED;
    M5.Lcd.fillRoundRect(315, (216-(x*24)), 5, 21, 2, (batt>(x*10))?clr:BLACK);  
  }
  M5.Lcd.setCursor(180, 172, 2);
  M5.Lcd.setTextColor(TFT_WHITE, TFT_BLACK);
  M5.Lcd.setTextSize(1);
  M5.Lcd.print("WiFi Signal: ");
  M5.Lcd.print(WiFi.RSSI());
}


// Remove the Track information (While changing stations)
void clearTrack() {
  M5.Lcd.fillRect(0,63,310,40, BLACK); // Clear the area of old data 
  M5.Lcd.drawRect(0,64,310,37, BLUE); // Draw a box around the Track Information
}


// Called when a metadata event occurs (i.e. an ID3 tag, an ICY block, etc.
void MDCallback(void *cbData, const char *type, bool isUnicode, const char *string) {
  const char *ptr = reinterpret_cast<const char *>(cbData);
  (void) isUnicode; // Punt this ball for now
  // Note that the type and string may be in PROGMEM, so copy them to RAM for printf
  char s1[32], s2[64];
  strncpy_P(s1, type, sizeof(s1));
  s1[sizeof(s1) - 1] = 0;
  strncpy_P(s2, string, sizeof(s2));
  s2[sizeof(s2) - 1] = 0;

  String band  = getValue(s2, '-', 0);
  band.trim();
  String track = getValue(s2, '-', 1);
  track.trim();
   
  Serial.printf("Band: %s   Track:  %s  \n", band.c_str(), track.c_str());
  Serial.printf("METADATA(%s) '%s' = '%s'\n", ptr, s1, s2);
  M5.Lcd.setTextSize(1);
  M5.Lcd.setCursor(5, 65, 2);
  clearTrack();
  M5.Lcd.print(band);
  M5.Lcd.setCursor(5, 82, 2);
  M5.Lcd.print(track);
  Serial.flush();
  displayBattery(); // Make sure the new song information does not overwrite the battery
}


// Called when there's a warning or error (like a buffer underflow or decode hiccup)
void StatusCallback(void *cbData, int code, const char *string) {
  const char *ptr = reinterpret_cast<const char *>(cbData);
  // Note that the string may be in PROGMEM, so copy it to RAM for printf
  char s1[64];
  strncpy_P(s1, string, sizeof(s1));
  s1[sizeof(s1) - 1] = 0;
  Serial.printf("STATUS(%s) '%d' = '%s'\n", ptr, code, s1);
  Serial.flush();
}


void stopPlaying() {
  Serial.printf("Stopping MP3...\n");
  if (mp3) {
    mp3->stop();
    delete mp3;
    mp3 = NULL;
  }
  Serial.printf("MP3 Stopped, Stopping Buffer...\n");
  if (buffmp3) {
    buffmp3->close();
    delete buffmp3;
    buffmp3 = NULL;
  }
  Serial.printf("Buffer stopped... Stopping File ...\n");
  if (filemp3) {
    filemp3->close();
    delete filemp3;
    filemp3 = NULL;
  }
  if (outmp3) {
    //    filemp3->close();
    delete outmp3;
    outmp3 = NULL;
  }

  Serial.printf("STATUS(Stopped)\n");
  Serial.flush();
}


// Update the Station Label
void updateStation(String message) {
  M5.Lcd.fillRect(0,30,315,30,BLACK); // Clear out other information on the line
  M5.Lcd.setCursor(0, 30, 2);
  M5.Lcd.setTextColor(TFT_WHITE, TFT_BLACK);
  M5.Lcd.setTextSize(2);
  M5.Lcd.println(message);
}


// Identify buttons at the bottom of screen
void drawButtons() {
  M5.Lcd.setCursor(5, 210, 2);
  M5.Lcd.setTextColor(TFT_BLACK,  TFT_YELLOW);
  M5.Lcd.setTextSize(2);
  M5.Lcd.println(" Vol     Station    Mute");
  M5.Lcd.setTextColor(TFT_WHITE,  TFT_BLACK);
  M5.Lcd.setTextSize(1);
}


// Change to the next station
void changeStation() {
  updateStation("Changing..Wait..");
  currentStationNumber++;
  if ( stationList[currentStationNumber][2] == "bad") currentStationNumber++; // Skip feeds marked as bad
  if (currentStationNumber >= stations) currentStationNumber = 0;
  Serial.printf("\n******** Changing to channel number: %i\n", currentStationNumber);
}


// Change the volume level
void changeVolume() {
  audioGain += 1.0;
  if (audioGain > 10.0) {
    audioGain = 1.0;
  }
  if (audioGain < 0.0) {
    audioGain = 0.0;
  }
  int xtPos = 260; // X Position for the Volume indication
  outmp3->SetGain(audioGain * gainfactor);
  M5.Lcd.fillRect(xtPos, 0, 320-xtPos-5, 21, BLACK);
  uint16_t clr = GREEN;
  if (audioGain > 9) clr = RED;
  else if (audioGain > 6) clr = BLUE;
  M5.Lcd.fillTriangle(xtPos, 20, xtPos + (5 * audioGain), 20, xtPos + (5 * audioGain), 20 - (2 * audioGain), clr);
}


void playMP3() {
  outmp3 = new AudioOutputI2S(0, 0); // Output to builtInDAC
  outmp3->SetPinout(12, 0, 2);
  outmp3->SetOutputModeMono(true);
  outmp3->SetGain(audioGain * gainfactor);
  filemp3 = new AudioFileSourceICYStream(stationList[currentStationNumber][1]);
  filemp3->RegisterMetadataCB(MDCallback, (void*)"ICY");
  buffmp3 = new AudioFileSourceBuffer(filemp3, bufferSize);
  buffmp3->RegisterStatusCB(StatusCallback, (void*)"buffer");
  mp3 = new AudioGeneratorMP3();
  mp3->RegisterStatusCB(StatusCallback, (void*)"mp3");
  mp3->begin(buffmp3, outmp3);
  Serial.printf("STATUS(URL) %s %s\n", stationList[currentStationNumber][0], stationList[currentStationNumber][1]);
  Serial.flush();
  updateStation(String(stationList[currentStationNumber][0]));
}


void loopMP3() {
  if (mp3 != NULL) {  // To avoid crash while changing stations
    if (mp3->isRunning()) {
      if (!mp3->loop()) mp3->stop();
    } else {
      Serial.printf("Status(Stream) Stopped \n");
      stationList[currentStationNumber][2] = "bad"; // Mark feed as bad if it won't play
      clearTrack();
      changeStation();
      //      stopPlaying();
      delay(1000);
      playMP3();
    }
  }
}


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

  M5.begin();
  M5.Axp.SetSpkEnable(true);
  //  M5.Lcd.setRotation(3);
  M5.Lcd.fillScreen(BLACK);
  M5.Lcd.setTextSize(2);
//  M5.Lcd.setFreeFont(TT1);       
//  M5.Lcd.setFreeFont(FF33);
  M5.Lcd.setTextColor(TFT_GREEN, TFT_BLACK);
  M5.Lcd.println("Core2 Web Radio");
  M5.Lcd.setTextColor(TFT_WHITE, TFT_BLACK);
  M5.Lcd.setTextWrap(false);
  
  initwifi();
  delay(500);
  drawButtons();
  playMP3();
  changeVolume();  // To update Volume setting and graphic
  displayWiFiInformation();
//  Serial.printf("Battery Voltage: %f \n", M5.Axp.GetBatVoltage());
}


void loop() {
  loopMP3();
  M5.update();

  if (m5.BtnA.wasPressed()) { //Change Volume(Button A)
    changeVolume();
  }

  if (m5.BtnB.wasPressed()) { //Change Station(Button B)
    clearTrack();
    changeStation();
    stopPlaying();
    playMP3();
  }

  if (m5.BtnC.wasPressed()) { //Mute  (Button C)
    audioGain = -1.0;
    changeVolume();
  }
  
  if (disUpdate + 1000 < millis()) { // Update the battery voltage
    disUpdate = millis();
    displayBattery();
  }
}

Thank you,

but first when I added code to enable the I2S Speaker (using code from the example 'speak.ino' I manage to get something out of the speaker on CORE2, but the quality make it useless - it might get better turning the code, so will try do some test on that.

have you had a look at this repository - lots of examples too.

Good luck!
Felix