No audio when reading from SD card

Using Arduino Uno with MP3 Shield VS1035.
When looking at the code it seems it should play the audio but speakers get no sound.

#include <SPI.h>
#include <Adafruit_VS1053.h>
#include <SD.h>
#define CLK 13 // SPI Clock, shared with SD card
#define MISO 12 // Input data, from VS1053/SD card
#define MOSI 11 // Output data, to VS1053/SD card
// These are the pins used for the music maker shield
#define SHIELD_RESET 8
#define SHIELD_CS 6
#define SHIELD_DCS 7
#define CARDCS 4
#define DREQ 2
Adafruit_VS1053_FilePlayer musicPlayer =
Adafruit_VS1053_FilePlayer(SHIELD_RESET, SHIELD_CS, SHIELD_DCS, DREQ, CARDCS);
void setup() {
Serial.begin(9600);
Serial.println(“Adafruit VS1053 Simple Test”);
if (! musicPlayer.begin()) {
Serial.println(F(“Couldn’t find VS1053, do you have the right pins defined?”));
while (1);
}
Serial.println(F(“VS1053 found”));
SD.begin(CARDCS);
musicPlayer.setVolume(20,20);
musicPlayer.useInterrupt(VS1053_FILEPLAYER_PIN_INT);
Serial.println(F(“Playing track 001”));
musicPlayer.playFullFile(“track001”);
}

Please do not cross-post.

Duplicate deleted.