ESP32 Radio - How to improve the sound quality? - arduino

Question

I got this ESP32 Radio source code from this site.
I love it because its very simple radio and works fine on ESP32.
But sometime the sound is very choppy.
I suspect maybe because a lack of proper buffers, but I don't know how to fix it.
The code:
/*
WITHOUT OLED, only ESP32 & VS1053
VS1053 - connections detail
XRST = EN (D3)
MISO = D19
MOSI = D23
SCLK = D18
VCC = 5V / 3.3 V
Gnd = Gnd
*/
#include <VS1053.h> //ESP_VS1053_Library
#include <Preferences.h> //For reading and writing into the ROM memory
Preferences preferences;
unsigned int counter,old_counter,new_counter;
#include "helloMp3.h"
#include <WiFi.h>
#include <HTTPClient.h>
#include <esp_wifi.h>
char ssid[] = "SSID"; // your network SSID (name)
char pass[] = "PASSWORD"; // your network password
char *host[7] = {"184.95.47.178","us4.internet-radio.com","us3.internet-radio.com","us3.internet-radio.com","174.36.206.197","sj64.hnux.com","uk7.internet-radio.com"};
char *path[7] = {"/","/","/live.m3u","/","/","/","/"};
int port[7] = {9328,8266,8371,8297,8000,80,8226};
char *sname[7] = {"Love-Radio-USA","Smooth-Jazz-Florida","Best-Rock-Radio","Country-Radio","Venice-Classic-Radio","Smooth-Jazz-Global","UK-Top-40"};
int change=13;
bool x=true;
int status = WL_IDLE_STATUS;
WiFiClient client;
uint8_t mp3buff[32]; // vs1053 likes 32 bytes at a time
// Wiring of VS1053 board (SPI connected in a standard way)
#define VS1053_CS 32 //32
#define VS1053_DCS 33 //33
#define VS1053_DREQ 35 //15
#define VOLUME 100 // volume level 0-100
VS1053 player(VS1053_CS, VS1053_DCS, VS1053_DREQ);
void setup () {
pinMode(change,INPUT_PULLUP);
// initialize SPI
Serial.begin(115200);
delay(500);
// initialize SPI bus;
SPI.begin();
// initialize VS1053 player
player.begin();
// player.switchToMp3Mode(); // optional, some boards require this
player.setVolume(VOLUME);
WiFi.begin(ssid, pass);
while (WiFi.status() != WL_CONNECTED) {
// display.drawString(0,15," Connecting..");
delay(500);
Serial.print(".");
}
Serial.println("WiFi connected");
Serial.print("IP address:");
Serial.println(WiFi.localIP());
preferences.begin("my-app", false);
counter = preferences.getUInt("counter", 0);
old_counter=counter;
Serial.printf("Current counter value1: %u\n", counter);
//if(counter>0) counter=0;
//Serial.printf("Current counter value2: %u\n", counter);
delay(100);
player.playChunk(hello2, sizeof(hello2)); //VS1053 is wake up & running
station_connect(counter);
}
void loop() {
if (client.available() > 0) {
uint8_t bytesread = client.read(mp3buff, 32);
player.playChunk(mp3buff, bytesread);
}
if(digitalRead(change)==0 and x==true){
x=false;
counter = counter+1;
if(counter>6) counter=0;
preferences.putUInt("counter",counter);
new_counter=counter;
Serial.printf("Old_Counter: %u\n",old_counter);
Serial.printf("New_Counter: %u\n",new_counter);
Serial.printf("Set counter to new_value: %u\n", counter);
delay(500);
if(old_counter != new_counter) {
player.softReset();
x=true;
station_connect(new_counter);
preferences.putUInt("counter",new_counter);
}
}
}
void station_connect (int station_no ) {
if (client.connect(host[station_no],port[station_no]) ) {
Serial.println("Connected now");
}
Serial.print(host[station_no]);
Serial.println(path[station_no]);
Serial.println(sname[station_no]);
client.print(String("GET ") + path[station_no] + " HTTP/1.1\r\n" +
"Host: " + host[station_no] + "\r\n" +
"Connection: close\r\n\r\n");
}
How to improve the sound quality? Please help
Thanks for all the helpers! :)