ESP32 using ESP32-audioI2S-master library

[buffalobillyboy]

Hello

I am using the ESP32-audioI2S-master library, SPI library for an SD card reader, a pcm5102
i2s DAC, and a headphone.
I want to switch (on-the-fly) from internet radio to SD card, and back to internet radio.
I can sequentially switch from internet server1, to server2, then to the SD card with no
problem. But when I try to switch back to server1, there is no more audio unless I reboot.
Below is my code. Does anyone have an idea on what is happening? Thank you!

CODE:

#include "Arduino.h"
#include "WiFi.h"
#include "Audio.h"
#include "SD.h"
#include "FS.h"

#define I2S_DOUT  22
#define I2S_BCLK  26
#define I2S_LRC   25

/*        
                             PCM5102_XMT<---
ESP32_Gnd------------------->PCM5102_FMT    |
ESP32_25-------------------->PCM5102_LCK    |
ESP32_22-------------------->PCM5102_DIN    |
ESP32_26-------------------->PCM5102_BCK    |
ESP32_Gnd------------------->PCM5102_SCL    |
ESP32_Gnd------------------->PCM5102_DMP    |
ESP32_Gnd------------------->PCM5102_FLT    |
ESP32_Gnd------------------->PCM5102_GND    |
ESP32_Vin------------------->PCM5102_Vcc    |
                             PCM5102_3.3V---
*/

#define SD_CS          5
#define SPI_MOSI      23 
#define SPI_MISO      19
#define SPI_SCK       18

Audio audio;

String ssid =    "xxxxxxxxxx";
String password = "xxxxxxxxxx";

int toggle=0;
unsigned long changeChannels=millis();

void setup() 
{
  Serial.begin(115200);
  WiFi.disconnect();
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid.c_str(), password.c_str());
  while (WiFi.status() != WL_CONNECTED) 
  {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
  Serial.println("");
  audio.setPinout(I2S_BCLK, I2S_LRC, I2S_DOUT);
  pinMode(SD_CS, OUTPUT);      
  digitalWrite(SD_CS, HIGH); 
  SPI.begin(SPI_SCK, SPI_MISO, SPI_MOSI);
  if(!SD.begin(SD_CS))
  {
    Serial.println("Error accessing microSD card!");
    while(true); 
  }
  audio.setVolume(21);
  audio.connecttohost("0n-80s.radionetz.de:8000/0n-70s.mp3");
  //audio.connecttohost("http://icecast.radiofrance.fr/francemusiquelajazz-midfi.mp3");
  //audio.connecttoFS(SD,"/AfricanMist.mp3");
}

void loop()
{
  if (millis()-changeChannels>10000UL) //change channel every 10sec
  {
    Serial.println("change channels");
    changeChannels=millis();
    if (toggle==0)
    {
      toggle=1;
      audio.connecttohost("http://icecast.radiofrance.fr/francemusiquelajazz-midfi.mp3");
    }
    else if (toggle==1)
    {
      toggle=2;
      audio.connecttoFS(SD,"/AfricanMist.mp3");
    }
    else if (toggle==2)
    {
      toggle=0;
      audio.connecttohost("0n-80s.radionetz.de:8000/0n-70s.mp3");
    }
  }
  
  audio.loop();
}

void audio_info(const char *info) {
  Serial.print("info        "); Serial.println(info);
}
void audio_id3data(const char *info) { //id3 metadata
  Serial.print("id3data     "); Serial.println(info);
}
void audio_eof_mp3(const char *info) { //end of file
  Serial.print("eof_mp3     "); Serial.println(info);
}
void audio_showstation(const char *info) {
  Serial.print("station     "); Serial.println(info);
}
void audio_showstreaminfo(const char *info) {
  Serial.print("streaminfo  "); Serial.println(info);
}
void audio_showstreamtitle(const char *info) {
  Serial.print("streamtitle "); Serial.println(info);
}
void audio_bitrate(const char *info) {
  Serial.print("bitrate     "); Serial.println(info);
}
void audio_commercial(const char *info) { //duration in sec
  Serial.print("commercial  "); Serial.println(info);
}
void audio_icyurl(const char *info) { //homepage
  Serial.print("icyurl      "); Serial.println(info);
}
void audio_lasthost(const char *info) { //stream URL played
  Serial.print("lasthost    "); Serial.println(info);
}
void audio_eof_speech(const char *info) {
  Serial.print("eof_speech  "); Serial.println(info);
}