diff --git a/platformio.ini b/platformio.ini
index c4ae4984..4081b34f 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -31,10 +31,10 @@ extra_scripts =
     pre:updateSdkConfig.py
     pre:processHtml.py
 lib_deps =
-	https://github.com/schreibfaul1/ESP32-audioI2S.git#160b164 ; v3.4.0
+	https://github.com/schreibfaul1/ESP32-audioI2S.git#6b8264c ; v3.4.2+ set time offset
 	https://github.com/madhephaestus/ESP32Encoder.git#2c986e0
 	https://github.com/peterus/ESP-FTP-Server-Lib.git#554959f
-	https://github.com/FastLED/FastLED.git#f5c78fd ; v3.10.1+ fix of issue 16188
+	https://github.com/FastLED/FastLED.git#3d1f9fe ; v3.10.2
 	https://github.com/ESP32Async/ESPAsyncWebServer.git#35ee69e ; v3.7.10
 	https://github.com/bblanchon/ArduinoJson.git#3252013 ; v7.4.1
 	https://github.com/pschatzmann/arduino-audio-tools.git#c19fbd6 ; v1.0.2
@@ -56,7 +56,7 @@ board_build.embed_txtfiles =
 build_flags =
     -DCONFIG_ASYNC_TCP_RUNNING_CORE=0
     -DCONFIG_ASYNC_TCP_USE_WDT=1
-;    -DCORE_DEBUG_LEVEL=6
+    -DCORE_DEBUG_LEVEL=0 ;6
     -std=c++17
     -std=gnu++17
     -Wall
diff --git a/src/AudioPlayer.cpp b/src/AudioPlayer.cpp
index 2bd1683f..7de1852e 100644
--- a/src/AudioPlayer.cpp
+++ b/src/AudioPlayer.cpp
@@ -428,13 +428,11 @@ void AudioPlayer_Loop() {
 		AudioPlayer_CurrentTime = audio->getAudioCurrentTime();
 		AudioPlayer_FileDuration = audio->getAudioFileDuration();
 		// Calculate relative position in file (for trackprogress neopixel & web-ui)
-		uint32_t fileSize = audio->getFileSize();
-		gPlayProperties.audioFileSize = fileSize;
-		if (!gPlayProperties.playlistFinished && fileSize > 0) {
+		gPlayProperties.audioFileDuration = AudioPlayer_FileDuration;
+		if (!gPlayProperties.playlistFinished && AudioPlayer_FileDuration > 0) {
 			// for local files and web files with known size
 			if (!gPlayProperties.pausePlay && (gPlayProperties.seekmode != SEEK_POS_PERCENT)) { // To progress necessary when paused
-				uint32_t audioDataStartPos = audio->getAudioDataStartPos();
-				gPlayProperties.currentRelPos = ((double) (audio->getFilePos() - audioDataStartPos - audio->inBufferFilled()) / (fileSize - audioDataStartPos)) * 100;
+				gPlayProperties.currentRelPos = ((float) audio->getAudioCurrentTime() / audio->getAudioFileDuration()) * 100.0f;
 			}
 		} else {
 			if (gPlayProperties.isWebstream && (audio->getInBufferSize() > 0)) {
@@ -528,8 +526,8 @@ void AudioPlayer_Loop() {
 					Log_Println(cmndPause, LOGLEVEL_INFO);
 				}
 				if (gPlayProperties.saveLastPlayPosition && !gPlayProperties.pausePlay) {
-					Log_Printf(LOGLEVEL_INFO, trackPausedAtPos, audio->getFilePos(), audio->getFilePos() - audio->inBufferFilled());
-					AudioPlayer_NvsRfidWriteWrapper(gPlayProperties.playRfidTag, gPlayProperties.playlist->at(gPlayProperties.currentTrackNumber), audio->getFilePos() - audio->inBufferFilled(), gPlayProperties.playMode, gPlayProperties.currentTrackNumber, gPlayProperties.playlist->size());
+					Log_Printf(LOGLEVEL_INFO, trackPausedAtPos, audio->getAudioCurrentTime(), audio->getAudioFileDuration());
+					AudioPlayer_NvsRfidWriteWrapper(gPlayProperties.playRfidTag, gPlayProperties.playlist->at(gPlayProperties.currentTrackNumber), audio->getAudioCurrentTime(), gPlayProperties.playMode, gPlayProperties.currentTrackNumber, gPlayProperties.playlist->size());
 				}
 				gPlayProperties.pausePlay = !gPlayProperties.pausePlay;
 				Web_SendWebsocketData(0, WebsocketCodeType::TrackInfo);
@@ -744,7 +742,14 @@ void AudioPlayer_Loop() {
 				gPlayProperties.trackFinished = true;
 				return;
 			} else {
-				audioReturnCode = audio->connecttoFS(gFSystem, gPlayProperties.playlist->at(gPlayProperties.currentTrackNumber));
+				int32_t fileStartTime = -1;
+				if (gPlayProperties.startAtFilePos > 0) {
+					fileStartTime = gPlayProperties.startAtFilePos;
+					Log_Printf(LOGLEVEL_NOTICE, trackStartatPos, gPlayProperties.startAtFilePos);
+					gPlayProperties.startAtFilePos = 0;
+				}
+				audioReturnCode
+					= audio->connecttoFS(gFSystem, gPlayProperties.playlist->at(gPlayProperties.currentTrackNumber), fileStartTime);
 				// consider track as finished, when audio lib call was not successful
 			}
 		}
@@ -757,11 +762,6 @@ void AudioPlayer_Loop() {
 			if (gPlayProperties.currentTrackNumber) {
 				Led_Indicate(LedIndicatorType::PlaylistProgress);
 			}
-			if (gPlayProperties.startAtFilePos > 0) {
-				audio->setFilePos(gPlayProperties.startAtFilePos);
-				Log_Printf(LOGLEVEL_NOTICE, trackStartatPos, gPlayProperties.startAtFilePos);
-				gPlayProperties.startAtFilePos = 0;
-			}
 			const char *title = gPlayProperties.playlist->at(gPlayProperties.currentTrackNumber);
 			if (gPlayProperties.isWebstream) {
 				title = "Webradio";
@@ -792,9 +792,9 @@ void AudioPlayer_Loop() {
 				System_IndicateError();
 			}
 		} else if ((gPlayProperties.seekmode == SEEK_POS_PERCENT) && (gPlayProperties.currentRelPos > 0) && (gPlayProperties.currentRelPos < 100)) {
-			uint32_t newFilePos = uint32_t((double) audio->getAudioDataStartPos() * (1 - gPlayProperties.currentRelPos / 100) + (gPlayProperties.currentRelPos / 100) * audio->getFileSize());
-			if (audio->setFilePos(newFilePos)) {
-				Log_Printf(LOGLEVEL_NOTICE, JumpToPosition, newFilePos, audio->getFileSize());
+			uint32_t newFileTime = uint32_t((gPlayProperties.currentRelPos / 100.0f) * audio->getAudioFileDuration());
+			if (audio->setAudioPlayTime(newFileTime)) {
+				Log_Printf(LOGLEVEL_NOTICE, JumpToPosition, newFileTime, audio->getAudioFileDuration());
 			} else {
 				System_IndicateError();
 			}
diff --git a/src/AudioPlayer.h b/src/AudioPlayer.h
index 045c7190..0758e53a 100644
--- a/src/AudioPlayer.h
+++ b/src/AudioPlayer.h
@@ -21,7 +21,7 @@ typedef struct { // Bit field
 	bool repeatCurrentTrack		: 1; // If current track should be looped
 	bool repeatPlaylist			: 1; // If whole playlist should be looped
 	uint16_t currentTrackNumber : 9; // Current tracknumber
-	unsigned long startAtFilePos; // Offset to start play (in bytes)
+	unsigned long startAtFilePos; // Offset to start play (in seconds)
 	double currentRelPos; // Current relative playPosition (in %)
 	bool sleepAfterCurrentTrack : 1; // If uC should go to sleep after current track
 	bool sleepAfterPlaylist		: 1; // If uC should go to sleep after whole playlist
@@ -48,7 +48,7 @@ typedef struct { // Bit field
 	int8_t gainHighPass = 0; // High Pass for EQ Control
 	size_t coverFilePos; // current cover file position
 	size_t coverFileSize; // current cover file size
-	size_t audioFileSize; // file size of current audio file
+	size_t audioFileDuration; // file duration of current audio file (in seconds)
 } playProps;
 
 extern playProps gPlayProperties;
diff --git a/src/Led.cpp b/src/Led.cpp
index b53a2e29..35526092 100644
--- a/src/Led.cpp
+++ b/src/Led.cpp
@@ -424,7 +424,7 @@ static void Led_Task(void *parameter) {
 			nextAnimation = LedAnimationType::Idle;
 		} else if (gPlayProperties.pausePlay && !gPlayProperties.isWebstream) {
 			nextAnimation = LedAnimationType::Pause;
-		} else if ((gPlayProperties.playMode != BUSY) && (gPlayProperties.playMode != NO_PLAYLIST) && gPlayProperties.audioFileSize > 0) { // progress for a file/stream with known size
+		} else if ((gPlayProperties.playMode != BUSY) && (gPlayProperties.playMode != NO_PLAYLIST) && gPlayProperties.audioFileDuration > 0) { // progress for a file/stream with known size
 			nextAnimation = LedAnimationType::Progress;
 		} else if (gPlayProperties.isWebstream) { // webstream animation (for streams with unknown size); pause animation is also handled by the webstream animation function
 			nextAnimation = LedAnimationType::Webstream;