diff --git a/partitions-4m-factory.csv b/partitions-4m-factory.csv
new file mode 100644
index 0000000..0c867ea
--- /dev/null
+++ b/partitions-4m-factory.csv
@@ -0,0 +1,4 @@
+# Name,   Type, SubType, Offset,  Size, Flags
+nvs,      data, nvs,     0x9000,  0x6000,
+phy_init, data, phy,     0xf000,  0x1000,
+factory,  app,  factory, 0x10000, 4M
\ No newline at end of file
diff --git a/platformio.ini b/platformio.ini
index e792ec7..86936a8 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -2,8 +2,10 @@
 platform = espressif32
 board = esp32dev
 framework = arduino
+board_build.partitions = partitions-4m-factory.csv
 lib_deps = https://github.com/pschatzmann/arduino-snapclient
            https://github.com/pschatzmann/arduino-audio-tools
            https://github.com/pschatzmann/arduino-audio-driver
            https://github.com/pschatzmann/arduino-libopus
-           https://github.com/bblanchon/ArduinoJson
\ No newline at end of file
+           https://github.com/bblanchon/ArduinoJson
+           https://github.com/pschatzmann/arduino-libhelix
\ No newline at end of file
diff --git a/src/Entry.h b/src/Entry.h
deleted file mode 100644
index 2c7e557..0000000
--- a/src/Entry.h
+++ /dev/null
@@ -1,37 +0,0 @@
-#ifndef ENTRY_H
-#define ENTRY_H
-
-#include <ArduinoJson.h>
-
-enum Type {
-  T_UNKNOWN_,
-  T_SNAP,
-  T_FILE,
-  T_HTTP,
-};
-
-static Type typeFromString(const String &name) {
-  if (name.equals("SNAP")) {
-    return T_SNAP;
-  }
-  if (name.equals("FILE")) {
-    return T_FILE;
-  }
-  if (name.equals("HTTP")) {
-    return T_HTTP;
-  }
-  Serial.printf("[ERROR] _isPlaying: type not implemented: %s\n", name.c_str());
-  return T_UNKNOWN_;
-}
-
-struct Entry {
-
-  Type type;
-
-  String url;
-
-  String title;
-
-};
-
-#endif
diff --git a/src/Player.cpp b/src/Player.cpp
deleted file mode 100644
index 367a3dc..0000000
--- a/src/Player.cpp
+++ /dev/null
@@ -1,222 +0,0 @@
-#include "Player.h"
-
-#include <LittleFS.h>
-
-Player::Player() : board(AudioKitEs8388V1), opus(), snap(wifi, board, opus) {
-  //
-}
-
-// ------------------------------------------------------------------------------------------------
-
-void Player::loop() {
-  if (playlistRequest) {
-    playlistRequest = false;
-    _loadPlaylist();
-  }
-  if (_isPlaying()) {
-    switch (should) {
-      case PLAY:
-        if (current != wanted) {
-          _stop();
-        }
-        break;
-      case PAUSE:
-        _pause();
-        break;
-      case STOP:
-        _stop();
-        break;
-    }
-  }
-  if (should == PLAY) {
-    _start();
-  }
-}
-
-// ------------------------------------------------------------------------------------------------
-
-void Player::loadPlaylist(const String &path) {
-  playlistPath = path;
-  playlistRequest = true;
-}
-
-void Player::play() {
-  if (entries != nullptr && playlistSize > 0 && wanted == nullptr) {
-    wanted = entries;
-  }
-  should = PLAY;
-}
-
-void Player::pause() {
-  should = PAUSE;
-}
-
-void Player::stop() {
-  should = STOP;
-}
-
-void Player::next() {
-  skip(+1);
-}
-
-void Player::previous() {
-  skip(-1);
-}
-
-void Player::skip(const int count) {
-  if (entries == nullptr || playlistSize <= 0) {
-    return;
-  }
-  playIndex(((wanted - entries + count) % playlistSize + playlistSize) % playlistSize);
-}
-
-void Player::playIndex(const size_t index) {
-  if (entries == nullptr || playlistSize <= 0) {
-    return;
-  }
-  wanted = index % playlistSize + entries;
-  should = PLAY;
-}
-
-// ------------------------------------------------------------------------------------------------
-
-void Player::_loadPlaylist() {
-  playlistRequest = false;
-
-  _stop();
-
-  if (entries != nullptr) {
-    free(entries);
-    entries = nullptr;
-  }
-
-  if (!LittleFS.exists(playlistPath)) {
-    Serial.println("Playlist file not found.");
-    return;
-  }
-
-  File file = LittleFS.open(playlistPath, "r");
-  if (!file) {
-    Serial.println("Failed to open playlist file.");
-    return;
-  }
-
-  JsonDocument playlist;
-  const auto error = deserializeJson(playlist, file);
-  file.close();
-
-  if (error) {
-    Serial.println("Failed to parse playlist JSON.");
-    return;
-  }
-
-  const auto jsonEntries = playlist["entries"].as<JsonArray>();
-  playlistSize = jsonEntries.size();
-  if (playlistSize <= 0) {
-    Serial.printf("Loaded playlist is empty.");
-    return;
-  }
-
-  entries = static_cast<Entry *>(malloc(sizeof(Entry) * playlistSize));
-  wanted = entries;
-
-  Entry *entry = entries;
-  for (auto jsonVar: jsonEntries) {
-    auto jsonEntry = jsonVar.as<JsonObject>();
-    if (jsonEntry == NULL) {
-      Serial.printf("Entry #%03d is not a JsonObject\n", entry - entries);
-      continue;
-    }
-    if (!jsonEntry["type"].is<String>()) {
-      Serial.printf("Entry #%03d has no String 'type'\n", entry - entries);
-      continue;
-    }
-    if (!jsonEntry["url"].is<String>()) {
-      Serial.printf("Entry #%03d has no String 'url'\n", entry - entries);
-      continue;
-    }
-    if (!jsonEntry["title"].is<String>()) {
-      Serial.printf("Entry #%03d has no String 'title'\n", entry - entries);
-      continue;
-    }
-    entry->type = typeFromString(jsonEntry["type"].as<String>());
-    entry->url = jsonEntry["url"].as<String>();
-    entry->title = jsonEntry["title"].as<String>();
-    entry++;
-  }
-}
-
-bool Player::_isPlaying() {
-  if (entries == nullptr || current == nullptr) {
-    return false;
-  }
-  switch (current->type) {
-    case T_SNAP:
-      return snap.doLoop();
-    default:
-      Serial.printf("[ERROR] _isPlaying: type not implemented: %d\n", current->type);
-      break;
-  }
-  return false;
-}
-
-void Player::_start() {
-  current = wanted;
-  if (entries == nullptr || current == nullptr) {
-    Serial.println("[ERROR] _start: current == null => STOP");
-    should = STOP;
-    return;
-  }
-
-  bool success = false;
-  switch (current->type) {
-    case T_SNAP:
-      success = _snapStart(current->url);
-      break;
-    default:
-      Serial.printf("[ERROR] _start: type not implemented: %d\n", current->type);
-      success = false;
-      break;
-  }
-  if (success) {
-    Serial.printf("Started: #%03d: %s\n", current - entries, current->url.c_str());
-  } else {
-    Serial.printf("Failed to start: #%03d: %s\n", current - entries, current->url.c_str());
-    next();
-  }
-}
-
-void Player::_pause() {
-  switch (current->type) {
-    case T_SNAP:
-      snap.end();
-      break;
-    default:
-      Serial.printf("[ERROR] _pause: type not implemented: %d\n", current->type);
-      break;
-  }
-}
-
-void Player::_stop() {
-  if (current != nullptr) {
-    switch (current->type) {
-      case T_SNAP:
-        snap.end();
-        break;
-      default:
-        Serial.printf("[ERROR] _stop: type not implemented: %d\n", current->type);
-        break;
-    }
-  }
-  current = nullptr;
-  wanted = nullptr;
-}
-
-// ------------------------------------------------------------------------------------------------
-
-bool Player::_snapStart(const String &host) {
-  IPAddress ip;
-  WiFi.hostByName(host.c_str(), ip);
-  snap.setServerIP(ip);
-  return snap.begin();
-}
diff --git a/src/Player.h b/src/Player.h
deleted file mode 100644
index f941c64..0000000
--- a/src/Player.h
+++ /dev/null
@@ -1,86 +0,0 @@
-#ifndef PLAYER_H
-#define PLAYER_H
-
-#include "Entry.h"
-
-#include <WString.h>
-
-#include "SnapClient.h"
-#include "AudioTools/AudioCodecs/CodecOpus.h"
-#include "AudioTools/AudioLibs/AudioBoardStream.h"
-
-enum State {
-  STOP, PLAY, PAUSE
-};
-
-class Player {
-
-  WiFiClient wifi;
-
-  AudioBoardStream board;
-
-  OpusAudioDecoder opus;
-
-  SnapClient snap;
-
-  String playlistPath;
-
-  size_t playlistSize = 0;
-
-  bool playlistRequest = false;
-
-  Entry *entries = nullptr;
-
-  Entry *wanted = nullptr;
-
-  Entry *current = nullptr;
-
-  State should = STOP;
-
-  bool repeatAll = false;
-
-  bool repeatOne = false;
-
-  bool shuffle = false;
-
-public:
-
-  Player();
-
-  void loop();
-
-  void loadPlaylist(const String &path);
-
-  void play();
-
-  void pause();
-
-  void stop();
-
-  void skip(int count);
-
-  void next();
-
-  void previous();
-
-  void playIndex(size_t index);
-
-private:
-
-  void _loadPlaylist();
-
-  void _start();
-
-  bool _isPlaying();
-
-  void _pause();
-
-  void _stop();
-
-  // ----------------------------------
-
-  bool _snapStart(const String &host);
-
-};
-
-#endif
diff --git a/src/audio.cpp b/src/audio.cpp
index 4de624d..f2eddbc 100644
--- a/src/audio.cpp
+++ b/src/audio.cpp
@@ -1,76 +1,176 @@
 #include "audio.h"
 
-#include "SnapClient.h"
-#include "wifi.h"
-#include "AudioTools/AudioCodecs/CodecOpus.h"
+#include "AudioTools.h"
 #include "AudioTools/AudioLibs/AudioBoardStream.h"
+#include "AudioTools/AudioCodecs/CodecMP3Helix.h"
+#include "AudioTools/AudioCodecs/CodecOpus.h"
 
-WiFiClient wifi;
+#include <SPI.h>
+#include <SD.h>
+
+#include "SnapClient.h"
 
 AudioBoardStream board(AudioKitEs8388V1);
 
-OpusAudioDecoder opus;
+File file;
 
-SnapClient snap(wifi, board, opus);
+ICYStream icy;
 
-unsigned long snapLast = 0;
+WiFiClient wifi;
 
-bool snapState = false;
+OpusAudioDecoder opusDecoder;
 
-void audioSetup() {
-  board.setVolume(0.1);
-  snap.setServerIP(IPAddress(10, 0, 0, 50));
-}
+SnapClient snap(wifi, board, opusDecoder);
 
-void audioStarted() {
-  Serial.printf("SNAP started\n");
-}
+MP3DecoderHelix mp3Decoder;
 
-void audioStopped() {
-  Serial.printf("SNAP stopped\n");
-  snapState = false;
+EncodedAudioStream mp3Stream(&board, &mp3Decoder);
+
+StreamCopy copier;
+
+bool running = false;
+
+void audioStop() {
+  if (running) {
+    running = false;
+    Serial.println("[STOP]");
+  }
+  copier.end();
+  mp3Stream.end();
+  mp3Decoder.end();
+  opusDecoder.end();
+  icy.end();
+  file.close();
   snap.end();
 }
 
-void audioStart() {
-  if (snapLast == 0 || millis() - snapLast >= 3000) {
-    Serial.printf("SNAP connecting...\n");
-    snapLast = max(1UL, millis());
-    snapState = snap.begin();
-    if (snapState) {
-      Serial.printf("SNAP connected\n");
-    } else {
-      Serial.printf("SNAP failed to connected\n");
-    }
+bool audioBeginMP3Stream(const char *code, Stream &source) {
+  if (!mp3Decoder.begin()) {
+    Serial.printf("[%s] Failed to start MP3DecoderHelix.", code);
+    audioStop();
+    return false;
   }
+
+  if (!mp3Stream.begin()) {
+    Serial.printf("[%s] Failed to start EncodedAudioStream.", code);
+    audioStop();
+    return false;
+  }
+
+  copier.begin(mp3Stream, source);
+
+  if (copier.copy() == 0) {
+    Serial.printf("[%s] Failed to copy initial data.", code);
+    audioStop();
+    return false;
+  }
+
+  return true;
 }
 
-void audioLoop() {
-  if (!isWifiConnected()) {
-    snapLast = 0;
-    if (snapState) {
-      audioStopped();
-    }
-    return;
+bool audioPlayICY(const String &url) {
+  audioStop();
+
+  Serial.printf("[ICY] %s", url.c_str());
+  running = true;
+
+  if (!icy.begin(url.c_str())) {
+    Serial.println("[ICY] Failed to start ICYStream.");
+    audioStop();
+    return false;
   }
 
-  auto state = false;
-  if (snapState) {
-    state = snap.doLoop();
-  }
-
-  if (snapState) {
-    if (state) {
-      // still running
-    } else {
-      audioStopped();
-    }
-  } else {
-    if (state) {
-      audioStarted();
-    } else {
-      audioStart();
-    }
-  }
-  snapState = state;
+  return audioBeginMP3Stream("ICY", icy);
+}
+
+bool audioPlaySNAP(const String &host) {
+  audioStop();
+
+  Serial.printf("[SNAP] %s\n", host.c_str());
+  running = true;
+
+  IPAddress ip;
+  if (!WiFiClass::hostByName(host.c_str(), ip)) {
+    Serial.println("[SNAP] Failed to resolve host.");
+    audioStop();
+    return false;
+  }
+
+  snap.setServerIP(ip);
+  if (!snap.begin()) {
+    Serial.println("[SNAP] Failed to connect.");
+    audioStop();
+    return false;
+  }
+
+  if (!opusDecoder.begin()) {
+    Serial.println("[SNAP] Failed to start OpusAudioDecoder.");
+    audioStop();
+    return false;
+  }
+
+  if (!snap.doLoop()) {
+    Serial.println("[SNAP] Failed to copy initial data.");
+    audioStop();
+    return false;
+  }
+
+  return true;
+}
+
+bool audioPlaySD(const String &url) {
+  audioStop();
+
+  Serial.printf("[SD] %s\n", url.c_str());
+  running = true;
+
+  if (!SD.begin(PIN_AUDIO_KIT_SD_CARD_CS)) {
+    Serial.println("[SD] Failed to mount SD-card.");
+    audioStop();
+    return false;
+  }
+
+  if (!SD.exists(url.c_str())) {
+    Serial.println("[SD] File not found.");
+    audioStop();
+    return false;
+  }
+
+  file = SD.open(url.c_str(), FILE_READ);
+  if (!file) {
+    Serial.println("[SD] Failed to open file.");
+    audioStop();
+    return false;
+  }
+
+  return audioBeginMP3Stream("SD", file);
+}
+
+bool audioPlay(const String &url) {
+  if (url.startsWith("http://") || url.startsWith("https://")) {
+    return audioPlayICY(url);
+  }
+  if (url.startsWith("sd://")) {
+    return audioPlaySD(url.substring(5));
+  }
+  if (url.startsWith("snap://") < 0) {
+    return audioPlaySNAP(url.substring(7));
+  }
+  Serial.printf("[ERROR] unknown protocol: %s\n", url.c_str());
+  return false;
+}
+
+void audioSetup() {
+  board.begin();
+}
+
+bool audioLoop() {
+  if (copier.copy() > 0) {
+    return true;
+  }
+  if (running) {
+    Serial.println("Stream ended!");
+    audioStop();
+  }
+  return false;
 }
diff --git a/src/audio.h b/src/audio.h
index aa88d45..83e7488 100644
--- a/src/audio.h
+++ b/src/audio.h
@@ -1,8 +1,14 @@
-#ifndef SNAP_H
-#define SNAP_H
+#ifndef AUDIO_H
+#define AUDIO_H
+
+#include <WString.h>
+
+bool audioPlay(const String &url);
+
+void audioStop();
 
 void audioSetup();
 
-void audioLoop();
+bool audioLoop();
 
 #endif
diff --git a/src/main.cpp b/src/main.cpp
index a1dcc15..c172687 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,15 +1,15 @@
 #include <Arduino.h>
 
 #include "wifi.h"
-#include "audio.h"
+#include "player.h"
 
 void setup() {
   delay(500);
   Serial.begin(115200);
-  audioSetup();
+  playerSetup();
 }
 
 void loop() {
   wifiLoop();
-  audioLoop();
+  playerLoop();
 }
diff --git a/src/player.cpp b/src/player.cpp
new file mode 100644
index 0000000..4c45674
--- /dev/null
+++ b/src/player.cpp
@@ -0,0 +1,42 @@
+#include "player.h"
+
+#include <Arduino.h>
+
+#include "audio.h"
+
+#define DELAY_MS_ADD    250UL
+#define DELAY_MS_MAX    5000UL
+
+unsigned long errorMs = 0;
+
+unsigned long delayMs = 0;
+
+void playerSetup() {
+  audioSetup();
+}
+
+void playerLoop() {
+  if (audioLoop()) {
+    errorMs = 0;
+    return;
+  }
+  if (errorMs > 0 && millis() - errorMs < delayMs) {
+    return;
+  }
+  playerNext();
+}
+
+void playerNext() {
+  playerPlay("http://liveradio.sr.de/sr/sr1/mp3/128/stream.mp3");
+}
+
+void playerPlay(const String &url) {
+  if (audioPlay(url)) {
+    errorMs = 0;
+    delayMs = 0;
+  } else {
+    errorMs = max(1UL, millis());
+    delayMs = min(DELAY_MS_MAX, delayMs + DELAY_MS_ADD);
+    Serial.printf("retry delay: %d ms\n", delayMs);
+  }
+}
diff --git a/src/player.h b/src/player.h
new file mode 100644
index 0000000..cb73716
--- /dev/null
+++ b/src/player.h
@@ -0,0 +1,14 @@
+#ifndef PLAYER_H
+#define PLAYER_H
+
+#include <WString.h>
+
+void playerNext();
+
+void playerPlay(const String &url);
+
+void playerSetup();
+
+void playerLoop();
+
+#endif