AudioPlayer with SD A2DP Problem with loading subsequent Files. Next,Prevous and Play/Pause not working...

[lennart-rth]

Hey Phil!
I'am trying to use your libary for a sd-card - a2dp source - mp3 player.
Currently the functionality of play/pause, next/previous , setIndex, setPath does not work properly for me. I can however adjust the volume and play the first song that is on the sd-card.

I tried using your examples

1. https://github.com/pschatzmann/arduino-audio-tools/blob/main/examples/examples-player/player-sdfat-a2dp/player-sdfat-a2dp.ino
2. https://github.com/pschatzmann/arduino-audio-tools/blob/main/examples/examples-player/player-sdfat-a2dp/player-sdfat-a2dp.ino

On inspection with Serial.println and AudioLogger they both had problems finding the next song in the directory.
No matter if initiated by player.next(), player.path(), player.setIndex().
Console: [E] AudioSourceSDFAT.h : 111 - Filename is null.
The files could be read and played back successfully when each one was at index 0 of the dir. So they aren't corrupted or anything, right?

When using AudioLibs/AudioSourceIdxSDFAT.h or AudioLibs/AudioSourceIdxSD.h the idx.txt and idx-def.txt files where not properly set up.
Console:
[E] AudioSourceIdxSDFAT.h : 69 - Index file is empty
[E] AudioSourceSDFAT.h : 111 - Filename is null

or on player.next():
[E] AudioSourceIdxSDFAT.h : 61 - idx 1 > size 0

Here are my Index Files:
idx.txt:

/track.mp3
/trackk.mp3
/trackkkk.mp3

idx-def.txt:

/|mp3|*

Here is the code I use in void loop to initiate player.next() with a simple PULL UP button:

int c = 0;
int bounce = 0;

void loop() {
  player.copy();
  c = digitalRead(16);
 if (c == 0 && millis() - bounce >= 1000){
  bounce = millis();
  player.next();
 }
}

For Play/Pause I subsequently used:

int c = 0;
int bounce = 0;

void loop() {
  player.copy();
  c = digitalRead(16);
 if (c == 0 && millis() - bounce >= 1000){
  bounce = millis();
  Serial.print("player status=");
  Serial.println(player.isActive());
  player.next();
 }
}

Note that the player.isActive() actualy changes from true to false and back when the button is pressed.
The audio only stops and never starts again.

Do you have any ideas what my problem could be?
Is there anything obvious i am missing out on?
Thanks in advice for your awesome work:)

Whole console log:

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0030,len:1344
load:0x40078000,len:13964
load:0x40080400,len:3600
entry 0x400805f0
starting A2DP...
Started!
player.next(); Call done here.
[E] AudioSourceSDFAT.h : 111 - Filename is null

Board: ESP-WROOM32
IDE: Arduino IDE 1

[pschatzmann]

I never had any issues with finding any files.
Did you run the test sketches that come with the corresponding SD libraries ?

However I do not store the audio files in the root but have them in subdirectories by artist and then usually by album

[lennart-rth]

Thanks for the quick reply! Which test sketches do you mean?
So far I've used the standard Arduino SD library with this exact dev-board and sd-card and never had any problems! I also tried you Examples with the SD library and moving the files in a new dir! Nothing changed.
Do you have an example of an idx-def.txt file?
And is my way of calling player.next() in the void loop ok?

[pschatzmann]

I think you are confused: Try first to figure out which SD library you want to use!
Mixing things is asking for trouble!

https://github.com/pschatzmann/arduino-audio-tools/wiki/The-Audio-Player-Class

[lennart-rth]

So far i tried AudioSourceSD, AudioSourceIdxSD, AudioSourceSDFAT and AudioSourceIdxSDFAT. But the problem remained.

What exactly is the difference between AudioSourceSD and AudioSourceIdxSD?
It seems that seems to me that they implement the same functionality.Except that one uses an indexing file and the other is not.

[pschatzmann]

Right, that's the difference! Are you sure that you are setting the start directory and the file extension to the right values ?
Did you try to run the SD test sketch from ESP32 in Arduino ?
You usually get these kind if issues if you messed up with the SD formatting ...

https://github.com/pschatzmann/arduino-audio-tools/wiki/It's-not-working

[lennart-rth]

The debug Messages now show me that the SD library is not the problem!

[W] AudioA2DP.h : 276 - ==> state: Connecting
[W] AudioA2DP.h : 276 - ==> state: Connected
[W] AudioSourceSDFAT.h : 101 - selectStream SDFAT: 0
[W] AudioSourceSDFAT.h : 120 - -> selectStream: /music/track.mp3

// successfully playing the song...
// player.next() called...

[W] AudioSourceSDFAT.h : 96 - nextStream: 1
[W] AudioSourceSDFAT.h : 101 - selectStream SDFAT: 1
[W] AudioSourceSDFAT.h : 120 - -> selectStream: /music/trackk.mp3

// no music played, although the right song is selected.

I also printed the AudioPlayer output to the Serial Monitor and this shows that the next song is indeed played.
I conclude that the A2DPStream.h must be the problem.

It seems that the Bluetooth connection ends the audioStream every time a song is paused or a next song is selected.
Do you have any ideas what could actually cause this?

[pschatzmann]

You only show the warning messages: Did you change the log level to actually see in more detail what's happening ?

I guess A2DP is automatially dropping the connection when there is no audio for too long.
If I remember right You can prevent this in to ways

• There is a flag in the player to send 0 data on silence or
• There is a flag in the config for A2DPStream to automatically send 0 data

You can look up the method names in the class documentation

Here is a working example that I have tested with the AudioKit: https://github.com/pschatzmann/arduino-audio-tools/blob/main/examples/examples-audiokit/player-sd-audiokit/player-sd-audiokit.ino. You can replace the AudioKitStream with I2SStream and handle the audio actions and debouncing with AudioActions

[lennart-rth]

This was indeed the problem. The simple Bluetooth speaker now works flawlessly!
However, my Apple AirPods present an exception. I can connect them and play the first song, but the old problem still persists here. Even though AirPods are capable of understanding the standard A2DP.

Considering Apple's Audio Share mode, where one phone can send data to multiple AirPods, it's possible that AirPods use A2DP Dual Mode. This suggests that each earbud establishes a Bluetooth connection individually. Could this be a reason why the A2DP connection is lost after the first song? This may be due to the ESP32 only connecting to one Bluetooth address.

On the other hand, I can hear audio on both earbuds despite only connecting to one address.
Do you have any experience with AirPods and A2DP?
Is my idea about what might be causing the problem realistic?

[lennart-rth]

Here is a debug Log from a player.next() call. Before this there is music playing and then the A2DP Stream cuts of.
Do you see anything obvious in this? It seems right to me.

[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] VolumeStream.h : 138 - virtual size_t audio_tools::VolumeStream::write(const uint8_t*, size_t)
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioA2DP.h : 201 - virtual size_t audio_tools::A2DPStream::write(const uint8_t*, size_t): 4608
[D] AudioA2DP.h : 206 - Waiting for buffer to be available
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioA2DP.h : 206 - Waiting for buffer to be available
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioA2DP.h : 206 - Waiting for buffer to be available
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] SynchronizedBuffers.h : 394 - int audio_tools::SynchronizedBufferRTOS<T>::writeArray(const T*, int) [with T = unsigned char]: 4608
[D] AudioA2DP.h : 216 - Dwrite 4608 -> 4608 
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioEncoded.h : 377 - EncodedAudioOutput::write: 1024 -> 1024
[I] StreamCopy.h : 139 - StreamCopy::copy 1024 -> 1024 -> 1024 bytes - in 1 hops
[D] StreamCopy.h : 141 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
[D] AudioA2DP.h : [D] StreamCopy.h : 149 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
[D] AudioPlayer.h : 280 - [D] AudioA2DP.h : 316 - virtual bool audio_tools::AudioPlayer::next(int)
[I] AudioPlayer.h : 527 - void audio_tools::AudioPlayer::writeEnd()
[D] StreamCopy.h : 97 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioEncoded.h : 365 - EncodedAudioOutput::write: 1024
[D] CodecMP3Helix.h : 106 - virtual size_t audio_tools::MP3DecoderHelix::write(const void*, size_t): 1024
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] VolumeStream.h : 138 - virtual size_t audio_tools::VolumeStream::write(const uint8_t*, size_t)
[D] AudioA2DP.h : 316 - [Ia2dp_stream_source_sound_data: 512 -> 512
] Fade.h : 106 - faded out 1152 frames to volume 0.000000
[D] AudioA2DP.h[D] AudioA2DP.h :  : 201 - 316 - virtual size_t audio_tools::A2DPStream::write(const uint8_t*, size_t): 4608
[D] SynchronizedBuffers.h : 394 - int audio_tools::SynchronizedBufferRTOS<T
int audio_tools::SynchronizedBufferRTOS<T>::writeArray(const T*, int) [with T = unsigned char]: 4608
[D] AudioA2DP.h : 316 - [D] AudioA2DP.h : 216 - write 4608m_source_sound_data: 512 -> 512
Write 4608 -> 4608
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] VolumeStream.h : 138 - virtual size_t audio_tools::VolumeStream::write(const uint8_t*, size_t)
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioA2DP.h : 201 - virtual size_t audio_tools::A2DPStream::write(const uint8_t*, size_t): 4608
[D] AudioA2DP.h : 206 - Waiting for buffer to be available
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioA2DP.h : 316 - [D] SynchronizedBuffers.h : 394 - int audio_tools::SynchronizedBufferRTOS<T>::writeArray(const T*, int) [with T = unsigned char]: 4608
int audio_tools::SynchronizedBufferRTOS<T[D] AudioA2DP.h : 216 - 
Write 4608 -> 4608
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioEncoded.h : 377 - [D] AudioA2DP.h : 316 - EncodedAudioOutput::ound_data: 512 -> 5
A2dp_stream_source_sound_data: 512 -> 512
[I] StreamCopy.h : 139 - StreamCopy::copy 1024 -> 1024 -> 1024 bytes - in 1 hops
[D] AudioA2DP.h : 316 - [Da2dp_stream_source_sound_data: 512 -> 512
] StreamCopy.h : 141 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
[D] AudioA2DP.h : [D] StreamCopy.h : 149 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
316 - [D] StreamCopy.h : 155 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
[D] CodecMP3Helix.h : 77 - virtual void audio_tools::MP3DecoderHelix
Virtual void audio_tools::MP3DecoderHelix::begin()
[D] AudioA2DP.h : 316 - [D] MetaDataFilter.h : 30 - void audio_tools::MetaDataFilter<Decoder>
void audio_tools::MetaDataFilter<Decoder>::begin() [with Decoder = libhelix::MP3DecoderHelix]
[D] AudioA2DP.h : [I] AudioSourceSDFAT.h : 96 - 316 - nextStream: 1
A2dp_stream_source_sound_data: 512 -> 512
[I] AudioSourceSDFAT.h : 101 - selectStream SDFAT: 1
[D] SDDirect.h : 76 - listDir: /music/
[D] AudioA2DP.h : 316 - [Da2dp_stream_source_sound_data: 512 -> 512
] SDDirect.h : 241 - FileT audio_tools::SDDirect<SDT, FileT>::open(const char*) [with SDT = SdFat32; FileT = File32]
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] SDDirect.h : 143 - isDirectory music: 1
[D] SDDirect.h : 143 - [D] AudioA2DP.h : 316 - isDirectory musrce_s
A2dp_stream_source_sound_data: 512 -> 512
[D] SDDirect.h : 128 - void audio_tools::SDDirect<SDT, FileT>::rewind(FileT) [with SDT = SdFat32; FileT = File32]
[D] AudioA2DP.h : [D] SDDirect.h : 148 - 316 - FileT audio_tools::SDDirect<SDT512 -> 512
penNext(FileT&) [with SDT = SdFat32; FileT = File32]
A2dp_stream_source_sound_data: 512 -> 512
[D] AudioA2DP.h : 316 - [Da2dp_stream_source_sound_data: 512 -> 512
] SDDirect.h : 143 - isDirectory track.mp3: 0
[D] SDDirect.h : 211 - -> fileNamePath: track.mp3
[D] AudioA2DP.h : [D] SDDirect.h : 224 - 316 - <- fileNamePath: /music/track.mp3
A2dp_stream_source_sound_data: 512 -> 512
[D] SDDirect.h : 185 - -> isValidAudioFile: 'track.mp3': 1
[D] SDDirect.h : 109 - File /music/track.mp3 at index: 0[D] AudioA2DP.h : 316 - 
[D] SDDirect.h : 148 - FileT audio_tools::SDDirect<SDT, FileT>::openNext(FileT&) [with SDT = SdFat32; FileT = File32]
FileT audio_tools::SDDirect<SDT, FileT>::
[D] SDDirect.h : 143 - isDirectory trackk.mp3: 0
[D] SDDirect.h : 211 - [D] AudioA2DP.h : -> fileNamePath: trackk.mp3
316 - [D] SDDirect.h : 224 - <- fileNamePath: /music/trackk.mp3 -> 512
- fileNamePath: /music/trackk.mp3
[D] SDDirect.h : 185 - -> isValidAudioFile: 'trackk.mp3': 1
[D] SDDirect.h : 109 - [D] AudioA2DP.h : File /music/trackk.mp3 at index: 1
316 - [D] SDDirect.h : 148 - FileT audio_tools::SDDirect<SDT, FileT>::openNext(FileT&) [with SDT = SdFat32; FileT = File32]
FileT audio_tools::SDDirect<SDT, FileT>::
[D] SDDirect.h : 168 - void audio_tools::SDDirect<SDT, FileT>::popPath() [with SDT = SdFat32; FileT = File32]
[D] SDDirect.h : 171 - [D] AudioA2DP.h : popPath: 
316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[I] AudioSourceSDFAT.h : 120 - -> selectStream: /music/trackk.mp3
[D] AudioPlayer.h : 205 - virtual void audio_tools::AudioPlayer::end()
[D] AudioA2DP.h : [I] AudioEncoded.h : 355 - virtual void audio_tools::EncodedAudioOutput::end()
316 - [D] CodecMP3Helix.h : 87 - virtual void audio_tools::MP3DecoderHelix::end()
Virtual void audio_tools::MP3DecoderHelix
[I] MetaDataID3.h : 575 - virtual void audio_tools::MetaDataID3::end()
[I] AudioPlayer.h : 211 - reset codec
[D] AudioA2DP.h : [D] CodecMP3Helix.h : 87 - virtual void audio_tools::MP3DecoderHelix::end()
316 - [Da2dp_stream_source_sound_data: 512 -> 512
] CodecMP3Helix.h : 77 - virtual void audio_tools::MP3DecoderHelix::begin()
[D] AudioA2DP.h : 316 - [Da2dp_stream_source_sound_data: 512 -> 512
] MetaDataFilter.h : 30 - void audio_tools::MetaDataFilter<Decoder>::begin() [with Decoder = libhelix::MP3DecoderHelix]
[D] AudioA2DP.h : [D] AudioEncoded.h : 330 - virtual bool audio_tools::EncodedAudioOutput::begin()
316 - [D] AudioEncoded.h : 332 - virtual bool audio_tools::EncodedAudioOutput::begin()
Virtual bool audio_tools::EncodedAudioOut
[D] CodecMP3Helix.h : 77 - virtual void audio_tools::MP3DecoderHelix::begin()
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] MetaDataFilter.h : 30 - void audio_tools::MetaDataFilter<Decoder>::begin() [with Decoder = libhelix::MP3DecoderHelix]
[D] AudioA2DP.h : [D] AudioPlayer.h : 320 - open selected stream
316 - [Ia2dp_stream_source_sound_data: 512 -> 512
] MetaDataID3.h : 569 - virtual void audio_tools::MetaDataID3::begin()
[D] AudioStreams.h : 171 - [D] AudioA2DP.h : 316 - audio_tools::AudioStreamWrapper::AudioStreamWrapper(Stream&)
A2dp_stream_source_sound_data: 512 -> 512
[I] StreamCopy.h : 74 - [D] AudioA2DP.h : 316 - buffer_size=1024
A2dp_stream_source_sound_data: 512 -> 512
[D] AudioPlayer.h : 388 - virtual size_t audio_tools::AudioPlayer::copy()
[D] AudioA2DP.h : 316 - [D] StreamCopy.h : 97 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
Size_t audio_tools::StreamCopyT<T>::copy(
[D] AudioA2DP.h : 316 - [D] AudioEncoded.h : 365 - a2dp_stream_source_sound_data: 512 -> 512
EncodedAudioOutput::write: 1024
[D] CodecMP3Helix.h : 106 - [D] AudioA2DP.h : 316 - virtual size_t audio_tools::MP3DecoderHelix::write(const void*, size_t): 1024
A2dp_stream_source_sound_data: 512 -> 512
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioEncoded.h : 377 - EncodedAudioOutput::write: 1024 -> 1024
[I] StreamCopy.h : 139 - StreamCopy::copy 1024 -> 1024 -> 1024 bytes - in 1 hops
[D] StreamCopy.h : 141 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
[D] StreamCopy.h : 149 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
[D] StreamCopy.h : 155 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
[D] AudioPlayer.h : 388 - virtual size_t audio_tools::AudioPlayer::copy()
[D] StreamCopy.h : 97 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
[D] AudioEncoded.h : 365 - EncodedAudioOutput::write: 1024
[D] CodecMP3Helix.h : 106 - virtual size_t audio_tools::MP3DecoderHelix::write(const void*, size_t): 1024
[D] AudioEncoded.h : 377 - EncodedAudioOutput::write: 1024 -> 1024
[I] StreamCopy.h : 139 - StreamCopy::copy 1024 -> 1024 -> 1024 bytes - in 1 hops
[D] StreamCopy.h : 141 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
[D] StreamCopy.h : 149 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
[D] StreamCopy.h : 155 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
[D] AudioPlayer.h : 388 - virtual size_t audio_tools::AudioPlayer::copy()
[D] StreamCopy.h : 97 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
[D] AudioEncoded.h : 365 - EncodedAudioOutput::write: 1024
[D] CodecMP3Helix.h : 106 - virtual size_t audio_tools::MP3DecoderHelix::write(const void*, size_t): 1024

Goes on like this for a few seconds...

[D] CodecMP3Helix.h : 106 - virtual size_t audio_tools::MP3DecoderHelix::write(const void*, size_t): 1024
[D] AudioEncoded.h : 377 - EncodedAudioOutput::write: 1024 -> 1024
[I] StreamCopy.h : 139 - StreamCopy::copy 1024 -> 1024 -> 1024 bytes - in 1 hops
[D] StreamCopy.h : 141 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
[D] StreamCopy.h : 149 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
[D] StreamCopy.h : 155 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
[D] AudioPlayer.h : 388 - virtual size_t audio_tools::AudioPlayer::copy()
[D] StreamCopy.h : 97 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
[D] AudioEncoded.h : 365 - EncodedAudioOutput::write: 1024
[D] CodecMP3Helix.h : 106 - virtual size_t audio_tools::MP3DecoderHelix::write(const void*, size_t): 1024
[D] CodecMP3Helix.h : 131 - static void audio_tools::MP3DecoderHelix::infoCallback(MP3FrameInfo&, void*)
[D] AudioPlayer.h : 248 - virtual void audio_tools::AudioPlayer::setAudioInfo(audio_tools::AudioInfo)
[I] AudioPlayer.h : 249 - sample_rate: 44100
[I] AudioPlayer.h : 250 - bits_per_sample: 16
[I] AudioPlayer.h : 251 - channels: 2
[D] VolumeStream.h : 159 - virtual void audio_tools::VolumeStream::setAudioInfo(audio_tools::AudioInfo)
[D] AudioStreams.h : 59 - virtual void audio_tools::AudioStream::setAudioInfo(audio_tools::AudioInfo)
[I] AudioTypes.h : 91 - sample_rate: 44100
[I] AudioTypes.h : 92 - channels: 2
[I] AudioTypes.h : 93 - bits_per_sample: 16
[D] AudioStreams.h : 59 - virtual void audio_tools::AudioStream::setAudioInfo(audio_tools::AudioInfo)
[I] AudioTypes.h : 91 - sample_rate: 44100
[I] AudioTypes.h : 92 - channels: 2
[I] AudioTypes.h : 93 - bits_per_sample: 16
[D] VolumeStream.h : 138 - virtual size_t audio_tools::VolumeStream::write(const uint8_t*, size_t)
[I] Fade.h : 111 - fade in 1152 frames from volume 0.000000
[D] AudioA2DP.h : 201 - virtual size_t audio_tools::A2DPStream::write(const uint8_t*, size_t): 4608
[D] SynchronizedBuffers.h : 394 - int audio_tools::SynchronizedBufferRTOS<T>::writeArray(const T*, int) [with T = unsigned char]: 4608
[D] AudioA2DP.h : 216 - [D] AudioA2DP.h : write 4608 -> 4608
316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioEncoded.h : 377 - EncodedAudioOutput::write: 1024 -> 1024
[I] StreamCopy.h : 139 - [D] AudioA2DP.h : 316 - StreamCopy::copy 1024 -> 1024 -> 1024 bytes - in 1 hops
A2dp_stream_source_sound_data: 512 -> 512
[D] StreamCopy.h : 141 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
[D] StreamCopy.h : 149 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
[D] StreamCopy.h : 155 - [D] AudioA2DP.h : size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
316 - [D] AudioPlayer.h : 388 - virtual size_t audio_tools::AudioPlayer::copy()
Virtual size_t audio_tools::AudioPlayer::
[D] StreamCopy.h : 97 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
[D] AudioA2DP.h : [D] AudioEncoded.h : 365 - 316 - EncodedAudioOutput::write: 1024

[D] CodecMP3Helix.h : 106 - virtual size_t audio_tools::MP3DecoderHelix::write(const void*, size_t): 1024
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] VolumeStream.h : 138 - virtual size_t audio_tools::VolumeStream::write(const uint8_t*, size_t)
[D] AudioA2DP.h : [D] AudioA2DP.h : 201 - 316 - virtual size_t audio_tools::A2DPStream::write(const uint8_t*, size_t): 4608
A2dp_stream_source_sound_data: 512 -> 512
[D] SynchronizedBuffers.h : 394 - int audio_tools::SynchronizedBufferRTOS<T>::writeArray(const T*, int) [with T = unsigned char]: 4608
[D] AudioA2DP.h : 316 - [Da2dp_stream_source_sound_data: 512 -> 512
] AudioA2DP.h : 216 - [write 4608 -> 4608
D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioEncoded.h : 377 - EncodedAudioOutput::write: 1024 -> 1024
[I] StreamCopy.h : 139 - [D] AudioA2DP.h : StreamCopy::copy 1024 -> 1024 -> 1024 bytes - in 1 hops
[D] 316 - StreamCopy.h : a2dp_stream_source_sound_data: 512 -> 512
141 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
[D] AudioA2DP.h : [D] StreamCopy.h : 149 - 316 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
A2dp_stream_source_sound_data: 512 -> 512
[D] StreamCopy.h : 155 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
[D] AudioA2DP.h : 316 - [Da2dp_stream_source_sound_data: 512 -> 512
] AudioPlayer.h : 388 - virtual size_t audio_tools::AudioPlayer::copy()
[D] StreamCopy.h : 97 - size_t audio_tools::StreamCopyT<T>::copy() [with T = unsigned char; size_t = unsigned int]
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioEncoded.h : 365 - EncodedAudioOutput::write: 1024
[D] CodecMP3Helix.h : 106 - virtual size_t audio_tools::MP3DecoderHelix::write(const void*, size_t): 1024
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] VolumeStream.h : 138 - virtual size_t audio_tools::VolumeStream::write(const uint8_t*, size_t)
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioA2DP.h : 201 - virtual size_t audio_tools::A2DPStream::write(const uint8_t*, size_t): 4608
[D] SynchronizedBuffers.h : 394 - [D] AudioA2DP.h : int audio_tools::SynchronizedBufferRTOS<T>::writeArray(const T*, int) [with T = unsigned char]: 4608
316 - [D] AudioA2DP.h : 216 - write 4608 -> 4608
Write 4608 -> 4608 sound_data: 512 -> 512
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioA2DP.h : 316 - [D] VolumeStream.h : a2dp_stream_source_sound_data: 512 -> 512
138 - virtual size_t audio_tools::VolumeStream::write(const uint8_t*, size_t)
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioA2DP.h : 316 - [D] AudioA2DP.h : 201 - a2dp_stream_source_sound_data: 512 -> 512
Virtual size_t audio_tools::A2DPStream::write(const uint8_t*, size_t): 4608
[D] AudioA2DP.h : 316 - [Da2dp_stream_source_sound_data: 512 -> 512
] SynchronizedBuffers.h : 394 - int audio_tools::SynchronizedBufferRTOS<T>::writeArray(const T*, int) [with T = unsigned char]: 4608
[D] AudioA2DP.h : 216 - [D] AudioA2DP.h : write 4608 -> 4608
316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioA2DP.h : 316 - a2dp_stream_source_sound_data: 512 -> 512
[D] AudioEncoded.h : 377 - EncodedAudioOutput::write: 1024 -> 1024
[I] StreamCopy.h : 139 - [StreamCopy::copy 1024 -> 1024 -> 1024 bytes - in 1 hops

[pschatzmann]

This looks normal to me.
To analyse issues with a2dp, i suggest to activate the standard esp32 logging used by a2dp.