ESP32 AudioKit 2.2 - no sound when playing WAV from SD, code from ESP8266Audio

Hey, I have an ESP32 AudioKit 2.2 and I want to play a WAV file through this, unfortunately it doesn't quite work for me. I have written code that loads the file from the SD card and using https://github.com/earlephilhower/ESP8266Audio, I run it. In the logs, I've done a start and an end and it takes as long as the song has (27 seconds). Unfortunately I can't hear anything in the headphones on the output. Can anyone help/answer how to improve this?

I've also tried using https://github.com/schreibfaul1/ESP32-audioI2S, but in that case you can hear the buzz for about 27 seconds as well.

My current code.

#include <Arduino.h>
#include <AudioFileSourceSD.h>
#include <AudioGeneratorWAV.h>
#include <AudioOutputI2S.h>
#include <SD.h>

#define SD_CS 13
#define SD_MOSI 15
#define SD_MISO 2
#define SD_SCK 14

AudioGeneratorWAV *wav;
AudioFileSourceSD *file;
AudioOutputI2S *out;

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

SPI.begin(SD_SCK, SD_MISO, SD_MOSI, SD_CS);

if (!SD.begin(SD_CS)) {
Serial.println("SD card error");
return;
}

file = new AudioFileSourceSD("/squid.wav");
out = new AudioOutputI2S(0, 0);
out->setGain(1);
out->begin();

wav = new AudioGeneratorWAV();
wav->begin(file, out);

Serial.println("Beginning WAV playback...")
}

void loop() {
if (wav->isRunning()) {
wav->loop();
} else {
Serial.println("Playback complete");
wav->stop();
delay(1000);
}
}
AI: On which audio output are you trying to listen to audio (jack, speaker, other)? Have you tried connecting other headphones or a speaker to rule out a hardware problem?
I have tried earphones output, lineout and rout/lout.
AI: What parameters does your WAV file have (sample rate, number of channels, bit resolution)? Have you perhaps tried with another WAV file with different parameters?
16-bit, mono, 44100 Hz