Playing MP3 from SD Card using Internal DAC

[CobaltEcho]

I keep getting a Error opening 'File1.mp3 in the Serial Monitor. I think I've gotten most of it correct, the code is debugging without issues, but I'm getting stuck on this.

I've swapped MOSI and MISO around to make sure the monitor would throw an error if the SD Reader wasn't correct (it did). So im pretty sure my wiring is good.

#include <Arduino.h>
#include "AudioFileSourceSD.h"
#include "AudioGeneratorMP3.h"
#include "AudioOutputI2S.h"

//SD Card Pins
#define SCK 18
#define MISO 19
#define MOSI 23
#define CS 2

// Analog Audio Out = Pin 25

File dir;
AudioFileSourceSD *source = NULL;
AudioOutputI2S *output = NULL;
AudioGeneratorMP3 *decoder = NULL;
bool first = true;

void setup() {
  Serial.begin(115200);
  Serial.println();
  delay(1000);

  audioLogger = &Serial;  
  source = new AudioFileSourceSD();
  output = new AudioOutputI2S(0, 1); //Using Internal DAC, Analog Audio on Pin 25
  decoder = new AudioGeneratorMP3();

  if (!SD.begin(CS)) {
    Serial.println("Problem starting SD");
    return;
  }
  Serial.println("SD initialised.");
  dir = SD.open("/"); 
}

void loop() {
  if ((decoder) && (decoder->isRunning())) {
    if (!decoder->loop()) decoder->stop();
  } else {
    File file = dir.openNextFile();
    if (file) { 
      if (!first) {
        source->close();
        if (source->open(file.name())) { 
          Serial.printf_P(PSTR("Playing '%s' from SD card...\n"), file.name());
          decoder->begin(source, output);
        } else {
          Serial.printf_P(PSTR("Error opening '%s'\n"), file.name());
        }
      }else first = false;
    } else {
      Serial.println(F("Playback from SD card done\n"));
      delay(1000);
    }       
  }
}

[CobaltEcho]

I think there was an issues with using my specific mp3 files, as it worked with wav files. Closing issue.