IOS poor quality audio

[Leo-Ha]

Problem Description

No matter how i play with the settings, it seems i only get very poor audio quality when i stream audio from IOS device through A2DP, with android it works flawlessly. Is there a solution for this? I checked all realted issues and searched online but did not find a solutrion myself

Device Description

ESP32-WROOM and Iphone 12
External DAC PCM5102A

Sketch

#include "BluetoothA2DPSinkQueued.h"

BluetoothA2DPSinkQueued a2dp_sink;

void setup() {
  a2dp_sink.start("MyMusicQueued");  

}


void loop() {
  delay(1000); // do nothing
}

Other Steps to Reproduce

No response

Provide your Version of the EP32 Arduino Core (or the IDF Version)

2.3.2

I have checked existing issues, discussions and online documentation

• I confirm I have checked existing issues, discussions and online documentation

[pschatzmann]

With my old IOS devices it is working w/o any problems.
I am not buying any recent Hardware from Apple any more, so I can't reproduce this.

[Leo-Ha]

Is there a way to add AAC codec support? I think it may be due to ios not liking the SBC codex too much.

With my old IOS devices it is working w/o any problems. I am not buying any recent Hardware from Apple any more, so I can't reproduce this.

[pschatzmann]

No, as far as I know, only SBC is supported by Espressif

[Leo-Ha]

I found this by esperiff

https://docs.espressif.com/projects/esp-adf/en/latest/api-reference/codecs/aac_decoder.html

[pschatzmann]

I don't understand, where is the connection with A2DP ?
Here is the link to the relevant API

[Leo-Ha]

I don't understand, where is the connection with A2DP ? Here is the link to the relevant API

Oh okay, in your linked document AAC is mentioned in this

uint8_t m24[ESP_A2D_CIE_LEN_M24]
MPEG-2, 4 AAC audio codec capabilities

do you know what this means?
And would you know is the AAC support limited by hardware on the esp32 or just software?

[pschatzmann]

But I did not find any method where you could provide this information....

[Leo-Ha]

But I did not find any method where you could provide this information....

I dont really understand the documentation or what you mean by that, i will try to search if theres a way to add AAC support but seems im out of luck with this one