Problem mit Iphone - Ton verzerrt

[MarcelNox]

Ich habe ein Script für ein einfaches Abspielen über BT inklusive GPIO Buttons erstellt. Getestet wurde es auf einem Android Gerät und es lief alles. Allerdings musste ich nun feststellen, dass bei einem Iphone der Ton abgehackt und nicht sauber wiedergegeben wird.
Leider habe ich hierzu keine Erklärung bzw. Lösung gefunden.
Es wird ein PCM5102-Dac-Decoder genutzt:

#include "BluetoothA2DPSink.h"

BluetoothA2DPSink a2dp_sink;

//Taster ///
int tasterPlay=32;
int tasterVor=25;
int tasterZurueck=33;

int tasterStatusPlay = LOW;          
int tasterGedruecktPlay = 0;    
int tasterStatusVor = LOW;       
int tasterGedruecktVor = 0;   
int tasterStatusZurueck = LOW;         
int tasterGedruecktZurueck = 0;         
      
int entprellZeit = 500; 

unsigned long tasterZeitPlay = 0;    
unsigned long tasterZeitVor = 0;    
unsigned long tasterZeitZurueck = 0;

int stop = 0;
int play = 0;

void executeNextCommand() {
  a2dp_sink.next();
}
void executeStopCommand() {
  a2dp_sink.stop();
}
void executePreviousCommand() {
  a2dp_sink.previous();
}
void executePlayCommand() {
  a2dp_sink.play();
}



void setup() {

pinMode(tasterPlay, INPUT);
pinMode(tasterVor, INPUT);
pinMode(tasterZurueck, INPUT);


  i2s_pin_config_t my_pin_config = {
      .mck_io_num = I2S_PIN_NO_CHANGE,
      .bck_io_num = 14,
      .ws_io_num = 15,
      .data_out_num = 22,
      .data_in_num = I2S_PIN_NO_CHANGE};
  a2dp_sink.set_pin_config(my_pin_config);
  a2dp_sink.start("DJK-Au");
  Serial.begin(115200);
  executeStopCommand();
  stop = 1;
}

void loop() 

{
  /////////Button Play//////
tasterStatusPlay = digitalRead(tasterPlay); 
        if (tasterStatusPlay == HIGH) 
          { 
          tasterZeitPlay = millis();     
          tasterGedruecktPlay = 1;   
          }
        if ((millis() - tasterZeitPlay > entprellZeit) && tasterGedruecktPlay == 1 && stop == 1)
          {
            Serial.println("Play");
            executePlayCommand();
            stop = 0;
            play = 1;
            tasterGedruecktPlay = 0;
            delay(250);

          }
        else if ((millis() - tasterZeitVor > entprellZeit) && tasterGedruecktPlay == 1 && play == 1)
          {
            Serial.println("Stop");
            executeStopCommand();
            play = 0;
            stop = 1;
           tasterGedruecktPlay = 0;
           delay(250);
          }
  ///////////////Zurueck//////////////
tasterStatusZurueck = digitalRead(tasterZurueck); 
        if (tasterStatusZurueck == HIGH) 
          { 
          tasterZeitZurueck = millis();     
          tasterGedruecktZurueck = 1;   
          }
        if ((millis() - tasterZeitZurueck > entprellZeit) && tasterGedruecktZurueck == 1)
          {
            Serial.println("Zurueck");
            executePreviousCommand();
            tasterGedruecktZurueck = 0;
            delay(250);
          }
  ///////////////Vor//////////
tasterStatusVor = digitalRead(tasterVor); 
        if (tasterStatusVor == HIGH) 
          { 
          tasterZeitVor = millis();     
          tasterGedruecktVor = 1;   
          }
        if ((millis() - tasterZeitVor > entprellZeit) && tasterGedruecktVor == 1)
          {
            Serial.println("Vor");
            executeNextCommand();
            stop = 0;
            play = 1;
            tasterGedruecktVor = 0;
            delay(250);
          }

}

[pschatzmann]

I guess this is just a duplicate of this issue.

• Did you try the queued output ?
• Are you getting any Errors or Warnings when you activate the log ?

Since I do not own any IPhone you are pretty much on your own, so any Pull Request which is addressing this issue is appreciated.
I also recommend to check the Espressif IDF issues

[MarcelNox]

No, I have not tested it yet. Unfortunately, I also lack the knowledge. The problem is that I don't own an iPhone myself. The issue occurred with two iPhone users. I thought perhaps more was already known here.
I have now set up another attempt with a different DAC and will test it.

[MarcelNox]

I have now tried another DAC (PCM5102) with the code above. The same result. Android works without problems. iPhone sound is distorted. Then I set up a test with the PCM5102 and tested this code here:

`/*
  Streaming Music from Bluetooth
  
  Copyright (C) 2020 Phil Schatzmann
  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

// ==> Example A2DP Receiver which uses I2S to an external DAC. The I2S output is managed via a separate Queue which might resolve popping sounds using the volume control on some IOS devices

#include "AudioTools.h"
#include "BluetoothA2DPSinkQueued.h"

I2SStream out;
BluetoothA2DPSinkQueued a2dp_sink(out);

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


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

Connection is established. However, after a few seconds, it is disconnected again.

`Guru Meditation Error: Core  1 panic'ed (LoadProhibited). Exception was unhandled.

Core  1 register dump:
PC      : 0x400d7c3e  PS      : 0x00060430  A0      : 0x800d28b8  A1      : 0x3ffed4e0  
A2      : 0x00000000  A3      : 0x3ffe4e9c  A4      : 0x00000200  A5      : 0x3ffed52c  
A6      : 0xffffffff  A7      : 0x3ffc3b4c  A8      : 0x00000000  A9      : 0x3ffed5f0  
A10     : 0x3ffc3540  A11     : 0x3ffc3740  A12     : 0x00000000  A13     : 0x3ffe4e9c  
A14     : 0x3ffed6bc  A15     : 0x80000001  SAR     : 0x00000000  EXCCAUSE: 0x0000001c  
EXCVADDR: 0x00000018  LBEG    : 0x00000000  LEND    : 0x00000000  LCOUNT  : 0x00000000  


Backtrace: 0x400d7c3b:0x3ffed4e0 0x400d28b5:0x3ffed520 0x400d2965:0x3ffed550 0x40198a4a:0x3ffed570 0x40198aed:0x3ffed590 0x400d4ad5:0x3ffed5b0 0x400d49b6:0x3ffed5d0 0x400d4bd2:0x3ffed5f0 0x400d4981:0x3ffed620




ELF file SHA256: c3d3c6e82a986e03

Rebooting...
ets Jul 29 2019 12:21:46

`

[pschatzmann]

Please provide the decoded stack trace and activate the log so that you can see any errors.
I can't reproduce this...

[MarcelNox]

Since I do not own an iPhone, logging the data is unfortunately a problem...