arduino-audio-tools it doesn't want to work with BLE

[G-Roman1988]

**** I am working on an esp32 based device with the following libraries: BLE from esp32 in arduino ide and arduino-audio-tools. I created a BLEServer and its working and it worked well for me, I need the device when it receives data from the client (phone) to play a sound on the internal dac and I installed the arduino-audio-tools library I took an example streams-memory_raw-i2s, I adapted it as needed, but when I send 1 from the phone, the sound is heard, then it freezes until disconnection and connection to the power source. please help me, any idea is welcome. thank you in advance. I'm a beginner. I am attaching my aii code.

vocespoint.txt
StarWars30.h.txt

[pschatzmann]

Just try to test each functionality separatly: e.g the sound processing triggered by some touch pins.
My gut feeling is that you need to do the audio output and BLE processing both in the loop. If you only do all the audio output you cause the BLE not to receive any events and it might hang.

If you want to watch in detail what's happening on the audio side you can set the log level to debug...

[G-Roman1988]

I made the first version as follows:

#include<BLECharacteristic.h>
#include<BLE2902.h>
#include<BLEAdvertisedDevice.h>
#include<BLEDevice.h>
#include<BLEUtils.h>
#include<BLEBeacon.h>
#include<BLEServer.h>
#include "AudioTools.h"
#include "StarWars30.h"
using namespace audio_tools;
uint8_t channels = 1;
uint16_t sample_rate = 48000;
AnalogAudioStream out;
MemoryStream music(StarWars30_raw, StarWars30_raw_len);
StreamCopyT<int16_t> copier(out, music);

BLEAdvertising *pAdvertising;
BLEServer *pServer = NULL;
BLECharacteristic * pTxCharacteristic;
bool deviceConnected = false;
bool oldDeviceConnected = false;
bool notificare = false;
bool StatusBeep =false;
unsigned long int timpmilis, anteriortimp = 0;
const int secunda =1000;
String mesagiValue = "salut";
int slen = mesagiValue.length();
uint8_t txValue[100];
#define BUUID "A134D0B2-1DA2-1BA7-C94C-E8E00C9F7A2D"
#define SERVICE_UUID "6E400001-B5A3-F393-E0A9-E50E24DCCA9E" // UART service UUID
#define CHARACTERISTIC_UUID_RX "6E400002-B5A3-F393-E0A9-E50E24DCCA9E"
#define CHARACTERISTIC_UUID_TX "6E400003-B5A3-F393-E0A9-E50E24DCCA9E"
void StopBeep(){
out.end();
stop();
}

class MyServerCallbacks: public BLEServerCallbacks {
void onConnect(BLEServer* pServer) {
deviceConnected = true;
Serial.print("este o conectare noua");
};

void onDisconnect(BLEServer* pServer) {
  deviceConnected = false;

Serial.print("clientul sa deconectat");
pServer->startAdvertising();
Serial.println("start advertising");
}
};

class MyCallbacks: public BLECharacteristicCallbacks {
void onWrite(BLECharacteristic *pCharacteristic) {
std::string rxValue = pCharacteristic->getValue();
Serial.print(rxValue.c_str());

if (rxValue.find("1") != -1) {
StatusBeep =true;
copier.copy()
Serial.println("sa livrat 1");
}
if(rxValue.find("0") != -1){
StatusBeep = false;
StopBeep();
Serial.println("sa livrat 0");
}
}
};
void personalserver(){
pServer = BLEDevice::createServer();
pServer->setCallbacks(new MyServerCallbacks());
BLEService *pService = pServer->createService(SERVICE_UUID);
pTxCharacteristic = pService->createCharacteristic(CHARACTERISTIC_UUID_TX, BLECharacteristic::PROPERTY_NOTIFY);
pTxCharacteristic->addDescriptor(new BLE2902());

BLECharacteristic * pRx = pService->createCharacteristic(CHARACTERISTIC_UUID_RX, BLECharacteristic::PROPERTY_WRITE);
pRx->setCallbacks(new MyCallbacks());
pService->start();
//pAdvertising = pServer->getAdvertising()->start();
}

void personalBeacon()
{
pAdvertising = pServer->getAdvertising();
BLEBeacon myBeacon;
myBeacon.setManufacturerId(0x4c00);
myBeacon.setMajor(5);
myBeacon.setMinor(88);
myBeacon.setSignalPower(0xc5);
myBeacon.setProximityUUID(BLEUUID(BUUID));
BLEAdvertisementData advertisementData;
advertisementData.setFlags(0x1A);
advertisementData.setManufacturerData(myBeacon.getData());
pAdvertising->setAdvertisementData(advertisementData);
// pAdvertising->setAdvertisementType(ADV_TYPE_IND);

pAdvertising->start();

}
void setup() {
Serial.begin(115200);
BLEDevice::init("punct de emiter");
personalserver();
personalBeacon();
Serial.println("asteptam o conectare ...");
auto config = out.defaultConfig(TX_MODE);
config.sample_rate = sample_rate;
config.channels = channels;
config.bits_per_sample = 16;
out.begin(config);

}

void loop() {
timpmilis = millis();
if (timpmilis -anteriortimp >= secunda)
anteriortimp =timpmilis;
if (!copier.copy()){
out.end();
stop();
}
if (deviceConnected) {
for (int i = 0; i < slen; i++)
txValue[i] = mesagiValue[i];
pTxCharacteristic->setValue(txValue, slen);
pTxCharacteristic->notify();
delay(500);
}
}
when I connect it to the power supply, it plays the sound once automatically and does not block, only when I send 1 from the phone does nothing. my intuition tells me that the DAC is disconnected this way but the version that crashes is a problem with the line: auto config = out.defaultConfig(TX_MODE);
maybe i'm not doing something right?
a beautiful day! let's hear each other better.

[pschatzmann]

Oh, so many errors:

• remove all the logic for stopping that is all over the place. You do more harm then good and It will stop automatically when it has played or after the timeout
• you forgot to call music.begin() on the connect event: you need to make sure that it has something to play. If you dont want to play from the beginning you can set it to loop mode.
• you forgot to calculate the timeout value in the connect event: do timeout = millis()+1000. If I understand you correctly it should play for 1 second when it has connected. Don't forget to define the global timeout variable which needs to be uint64_t
• in the loop you forgot to check for StatusBeep: you want to make sure that it is not playing when not connected
• do not use any delays in the loop!
• I think your timeout check in the loop is also still wrong: just do something like this in the loop for the audio

if (StatusBeep && millis() < timeout){
  copier.copy())
}

[G-Roman1988]

the sound is a beep and must be played once per second. when I call copier.copy(); in setup() it plays continuously, it doesn't stop. eu mam gândit să utilizez apel invers dar la momentnu prea știu carei și cum.I thought about using callback, but at the moment I don't really know which one and how. I tried temporarily with milis() but later I will do it with the timer, I would like to do it with the sound first.

[pschatzmann]

The thing that you need to make sure is that your logic for triggering is only called once. I assumed that this is working because this has nothing to do with my library! You should be able to verify this if you see"sa livrat 1" only once

I don't think that you want it to be played once per second (this is what it is doing now and means that it will play every second) but once for a second I guess!

[G-Roman1988]

yes, I checked and it is sent only once, not several times. I'm not saying that your library doesn't work or that it's to blame, more that they're not doing something right. I wrote with the thought that someone with experience would suggest how to do it correctly so that I don't have this problem. from the beginning when I made my example, I sent from the phone 1 restarts esp32 and says that I am calling an address to which I do not have access rights then I changed in arduino IDE in tools-> Events Run On: "Core Instruments 1 " -> Arduino runs: "Core 1" doesn't reboot after this. so something is wrong here too, I did this, please help me to take the right path. I understand that I need to change my code, but I don't quite understand where and how.

[pschatzmann]

Well I have sent you your logical errors. Did you try to resolve them as suggested ?

In addition you need to learn how to generate a stacktrace, so that you can find the code line which is causing your dump.

If you try to build a complicated solution you should first think how you can split it up into individual pieces that can be tested seperatly and then build and test each component before you put them together. Otherwise you don't have any chance to figure out where your bugs are...

[G-Roman1988]

I will change a little later in 5-6 hours.

[G-Roman1988]

and I came back, I made some changes and after I send 1 from the phone it restarts and in the terminal it shows an error in a memory. I tried to capture the screen from the terminal, I don't know how it was received, I'm blind and I can't see the image if it's successful.
terminal capture.docx
I hope something is clear in the picture. I made the changes in the following way and I realize it's wrong, but I don't understand how to do it correctly.
vocespoint .ino.txt Please help me. explain me how to play a sound after the sound is over how to stop it with or without callback. I accept any idea.

[pschatzmann]

I took the BLE server example from Arduino and added the audio playing function that I described in my comments above. The frequency is read from the BLE attribute and the sound is played for 1 second. You can adapt the example for your purpose....

#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEServer.h>

#include "AudioTools.h"
#include "AudioLibs/AudioKit.h"

// BLE
const char* SERVICE_UUID =     "4fafc201-1fb5-459e-8fcc-c5c9c331914b";
const char* CHARACTERISTIC_UUID = "beb5483e-36e1-4688-b7f5-ea07361b26a8";
uint64_t timeout = 0;
String value="0";

// audio output
AudioInfo info(44100, 1, 16);
AudioKitStream out;
SineWaveGenerator<int16_t> sineWave(32000);                // subclass of SoundGenerator with max amplitude of 32000
GeneratedSoundStream<int16_t> music(sineWave);             // Stream generated from sine wave
StreamCopy copier(out, music);

class ToneCallback: public BLECharacteristicCallbacks {
    void onWrite(BLECharacteristic *pCharacteristic) {
      std::string rxValue = pCharacteristic->getValue();
      Serial.print(rxValue.c_str());
      float frequency = std::stof(rxValue);
      if (frequency != 0.0) {
        // start audio
        Serial.print("playing ");
        Serial.println(frequency);
        sineWave.begin(info, frequency);
        music.begin(info);
        // limit to 1 second
        timeout = millis() + 1000;
        // reset to initial value
        value = "0";
        pCharacteristic->setValue(value.c_str());
      }
    }
} toneCallback;

void setup() {
  Serial.begin(115200);
  Serial.println("Starting BLE work!");

  // setup BLE
  BLEDevice::init("Tone Player");
  BLEServer *pServer = BLEDevice::createServer();
  BLEService *pService = pServer->createService(SERVICE_UUID);
  BLECharacteristic *pCharacteristic = pService->createCharacteristic(
                                         CHARACTERISTIC_UUID,
                                         BLECharacteristic::PROPERTY_READ |
                                         BLECharacteristic::PROPERTY_WRITE
                                       );

  pCharacteristic->setCallbacks(&toneCallback);
  pCharacteristic->setBroadcastProperty(true);
  pCharacteristic->setIndicateProperty(true);
  pCharacteristic->setNotifyProperty(true);
  pCharacteristic->setReadProperty(true);
  pCharacteristic->setValue(value.c_str());


  pService->start();
  // BLEAdvertising *pAdvertising = pServer->getAdvertising();  // this still is working for backward compatibility
  BLEAdvertising *pAdvertising = BLEDevice::getAdvertising();
  pAdvertising->addServiceUUID(SERVICE_UUID);
  pAdvertising->setScanResponse(true);
  pAdvertising->setMinPreferred(0x06);  // functions that help with iPhone connections issue
  pAdvertising->setMinPreferred(0x12);
  BLEDevice::startAdvertising();
  Serial.println("Characteristic defined! Now you can read it in your phone!");

  // setup audio output
  auto cfg = out.defaultConfig();
  cfg.copyFrom(info);
  out.begin(cfg);
}

void loop() {
  // output audio
  if (timeout > 0 && millis() < timeout) {
    copier.copy();
  } else {
    // if nothing is played we give BLE a chance to do something
    delay(50);
  }
}

[G-Roman1988]

Thanks for your time. many apologies, now I realized that I made mistakes when I explained what I wanted to opt for. I try to express myself once again, maybe I will explain correctly, etc. I have a sound stored in array with the following parameters: 48000 hz, 16 bit. I want when I send 1 from the phone through the BLEServer it plays this sound from the array and when it finishes playing the sound stops, this only through internal dac and on a channel (pin). I have such a question: I could replace the following line in your example GeneratedSoundStream<int16_t> music(sineWave); with MemoryStream music line(StarWars30_raw, StarWars30_raw_len); ? or am I wrong again like any newbie. I hope I explained well and you understood me correctly, if I'm wrong, please correct me. Warm greetings!

[pschatzmann]

I used a sine generator because this was easier to test, but you can replace this with any other audio source. The same is true for the audio destination. I used an AudioKit because I did not want to mess around with wires.

If you don't want to limit the duration just remove the timeout logic. There is nothing to do to stop because it will automatically stop at the end.

I would just recommend to use a much lower sampling rate: with 48000 you wast a lot of memory and you can easily go down to e.g. 16000 or even 8000. The internal DAC has such a low quality that you might not even notice a difference!

[G-Roman1988]

what do you recommend I can use to play the sound from the array? and how would i do it because when i tried the sound plays, stops for a few milliseconds and then plays again like that in a cycle. when i looked through your examples i found something with a callback, maybe i should use a flow with a callback to stop the sound when it reaches the end. this may be a bad idea on my part.

[pschatzmann]

I think that was caused by your delay() in the loop!
Never break the audio processing with some delays!

[G-Roman1988]

the following questions never leave me: audioKit an internal dac? if not which are internal? how is it better to use a stream with callback or without?

[pschatzmann]

I don't understand your question. The internal DAC of the ESP32 is cool to do some simple tests, but the audio quality is pretty bad. A better way is to use a DAC which is connected via I2S, but for that you need to connect 5 cables: 3 for the signal and 2 for the power.

This was getting annoying, so my preferred way is to use an audio board that has everything on one board. The Espressif LyraT or the AI Thinker AudioKit have an Audio Chip which consists of an ADC and DAC with an amplifier and a built in SD drive. You just need to plug in the speakers or you can use audio cables for the input or output.

[G-Roman1988]

is the audio kit an internal dac or not? but I tested YOUR example and understood that it is not internal and from YOUR explanation. and here the question arose how do I configure (set) internally if? another question, how is it better to use the callback stream to stop at the end of playback or not?

[pschatzmann]

This is a audio board that has an esp32 on it that you would need to buy if you want to use it!

[G-Roman1988]

      is the audio kit an internal dac or not? but I tested YOUR example and understood that it is not internal and from YOUR explanation. and here the question arose how do I configure (set) internally if? another question, how is it better to use the callback flow to stop at the end of playback or not? I have esp32 dev -V4 mode.

[pschatzmann]

I don't understand your questions:

• What do you mean with internal DAC in regard of the AudioKit: Internal to what? Why would you bother if you don't have this board ?
• What do you mean with callback flow to end of playback: Why do you think you need to end anything ?

[G-Roman1988]

I was referring to internal dac, how to configure i2s (or esp32) to play
sound on esp32 pin 25 or 26. when i meant callback what flow should i use when the data has been sent to the DAC (the sound has been played), a function is called and i stop the playback. so i don't check in loop(). I'm asking because I don't know how that's correct.

[pschatzmann]

But you already know the answer of this question, because you already used the AnalogAudioStream it in your sketch!
I just replaced it to test my sketch my AudioKit board which does not have any analog output.

I also replaced your audio source (MemoryStream) with a sine wave because I did not have the related file and because this was just more convenient to test.

Your MemoryStream is not endless, so it will automatically stop to play at the end you you don't need to do anything. As explained above however you need to care at the start when you want to play it again: The actual position must be re-set to the starting position, by calling begin()!

[G-Roman1988]

interesting that for me it didn't stop after it finished playing. but where did I go wrong to have such a result? I am attaching both files again and please help me to find my error. I myself have no idea how to get rid of this error.
vocespoint.ino.txt
StarWars30.h.txt
Maybe I did something wrong when I initiated or called? I've run out of ideas.

[pschatzmann]

Just compare my loop and your version! The difference is your mistake!

[G-Roman1988]

well, I'll do some more analyses, experiments, then I'll come back with good or negative results.

[G-Roman1988]

Please tell me how to correctly configure (set) AnalogAudioStream with parameters 44100 hz, 1 channel, 16 bit. the way I did it the first time doesn't work, but the way YOU did it with the audio info when compiling gives me an error.

[pschatzmann]

I already provided you with a working example: all you have to do is to replace the audio source and audio destination whith what you want to use!

[G-Roman1988]

yes i got it but when i modified YOUR example as follows:
#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEServer.h>

#include "AudioTools.h"
#include"AudioAnalog/AnalogAudio.h"
#include "AudioLibs/AudioKit.h"
#include "StarWars30.h"
//using namespace audio_tools;

// BLE
const char* SERVICE_UUID = "4fafc201-1fb5-459e-8fcc-c5c9c331914b";
const char* CHARACTERISTIC_UUID = "beb5483e-36e1-4688-b7f5-ea07361b26a8";
uint64_t timeout = 0;
String value="0";

// audio output
AudioInfo info(48000, 1, 16);

AnalogAudioStream out;
//SineWaveGenerator<int16_t> sineWave(32000); // subclass of SoundGenerator with max amplitude of 32000
//GeneratedSoundStream<int16_t> music(sineWave); // Stream generated from sine wave
MemoryStream music(StarWars30_raw, StarWars30_raw_len);
StreamCopy copier(out, music);

class ToneCallback: public BLECharacteristicCallbacks {
void onWrite(BLECharacteristic *pCharacteristic) {
std::string rxValue = pCharacteristic->getValue();
Serial.print(rxValue.c_str());
float frequency = std::stof(rxValue);
if (frequency != 0.0) {
// start audio
Serial.print("playing ");
Serial.println(frequency);
//sineWave.begin(info, frequency);
music.begin(info);

    // limit to 1 second
    timeout = millis() + 1000;
    // reset to initial value
    value = "0";
    pCharacteristic->setValue(value.c_str());
  }
}

} toneCallback;

void setup() {
Serial.begin(115200);
Serial.println("Starting BLE work!");

// setup BLE
BLEDevice::init("Tone Player esp32");
BLEServer *pServer = BLEDevice::createServer();
BLEService *pService = pServer->createService(SERVICE_UUID);
BLECharacteristic *pCharacteristic = pService->createCharacteristic(
CHARACTERISTIC_UUID,
BLECharacteristic::PROPERTY_READ |
BLECharacteristic::PROPERTY_WRITE
);

pCharacteristic->setCallbacks(&toneCallback);
pCharacteristic->setBroadcastProperty(true);
pCharacteristic->setIndicateProperty(true);
pCharacteristic->setNotifyProperty(true);
pCharacteristic->setReadProperty(true);
pCharacteristic->setValue(value.c_str());

pService->start();
// BLEAdvertising *pAdvertising = pServer->getAdvertising(); // this still is working for backward compatibility
BLEAdvertising *pAdvertising = BLEDevice::getAdvertising();
pAdvertising->addServiceUUID(SERVICE_UUID);
pAdvertising->setScanResponse(true);
pAdvertising->setMinPreferred(0x06); // functions that help with iPhone connections issue
pAdvertising->setMinPreferred(0x12);
BLEDevice::startAdvertising();
Serial.println("Characteristic defined! Now you can read it in your phone!");

// setup audio output

auto cfg = out.defaultConfig();
cfg.copyFrom(info);
out.begin(cfg);
}

void loop() {
// output audio
if (timeout > 0 && millis() < timeout) {
copier.copy();
} else {
// if nothing is played we give BLE a chance to do something
delay(50);
}
}
I got this error:
E:\info\audiobleserver\audiobleserver.ino: In member function 'virtual void ToneCallback::onWrite(BLECharacteristic*)':
E:\info\audiobleserver\audiobleserver.ino:37:23: error: no matching function for call to 'audio_tools::MemoryStream::begin(audio_tools::AudioInfo&)'
music.begin(info);
^
In file included from C:\Users\Roman-G\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.7\libraries\arduino-audio-tools-main\src/AudioTools/AudioPrint.h:6,
from C:\Users\Roman-G\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.7\libraries\arduino-audio-tools-main\src/AudioFilter/Equilizer.h:3,
from C:\Users\Roman-G\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.7\libraries\arduino-audio-tools-main\src/AudioTools.h:58,
from E:\info\audiobleserver\audiobleserver.ino:5:
C:\Users\Roman-G\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.7\libraries\arduino-audio-tools-main\src/AudioTools/AudioStreams.h:223:8: note: candidate: 'virtual bool audio_tools::MemoryStream::begin()'
bool begin() override {
^~~~~
C:\Users\Roman-G\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.7\libraries\arduino-audio-tools-main\src/AudioTools/AudioStreams.h:223:8: note: candidate expects 0 arguments, 1 provided

exit status 1

Compilation error: no matching function for call to 'audio_tools::MemoryStream::begin(audio_tools::AudioInfo&)'
I realized that I don't understand anything

[G-Roman1988]

tell me please where am I wrong and how can I do it right?

[G-Roman1988]

pschatzmann, please let me know if I have thought through the following ideas correctly: with your library to include AudioI2S/I2SESP32.h or AudioAnalog/AnalogAudioESP32.h, will I be able to opt, a sound played from the array on the internal DAC?

[G-Roman1988]

now I'm exploring the library and came across AudioLibs/AudioESP32ULP.h which I thought might be possible but haven't figured it out yet. is it possible?

[pschatzmann]

The AnalogAudioStream and I2SStream are part of the basic API which is automatically available when you include #include "AudioTools.h". Your mentioned includes are absolutely unnecessary!

[G-Roman1988]

yes it is, but nothing to cause an error, I removed everything I included. and the error remained those. E:\info\audiobleserver\audiobleserver.ino: In member function 'virtual void ToneCallback::onWrite(BLECharacteristic*)':
E:\info\audiobleserver\audiobleserver.ino:37:23: error: no matching function for call to 'audio_tools::MemoryStream::begin(audio_tools::AudioInfo&)'
music.begin(info);
^
In file included from C:\Users\Roman-G\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.7\libraries\arduino-audio-tools-main\src/AudioTools/AudioPrint.h:6,
from C:\Users\Roman-G\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.7\libraries\arduino-audio-tools-main\src/AudioFilter/Equilizer.h:3,
from C:\Users\Roman-G\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.7\libraries\arduino-audio-tools-main\src/AudioTools.h:58,
from E:\info\audiobleserver\audiobleserver.ino:5:
C:\Users\Roman-G\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.7\libraries\arduino-audio-tools-main\src/AudioTools/AudioStreams.h:223:8: note: candidate: 'virtual bool audio_tools::MemoryStream::begin()'
bool begin() override {
^~~~~
C:\Users\Roman-G\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.7\libraries\arduino-audio-tools-main\src/AudioTools/AudioStreams.h:223:8: note: candidate expects 0 arguments, 1 provided

exit status 1

Compilation error: no matching function for call to 'audio_tools::MemoryStream::begin(audio_tools::AudioInfo&)'

Please let me know what I'm doing wrong that I have this error and what you think about my ideas I wrote above.

[pschatzmann]

Just read the error message: bool begin(): candidate expects 0 arguments, 1 provided

[G-Roman1988]

I tried but unfortunately it doesn't work, it should play the sound from the array and stop at the end of the sound. with the given line: copier.copy(); the sound is played continuously. and with music.begin();. do nothing. now it's on 2 channels. how does it change in the audio info() so that it is on one channel, eg pin 25? please help me a lot to make it work.

[G-Roman1988]

please don't be upset that I ask so much. I am a beginner and many things are not clear to me, but I try to make a great effort to understand. What IDE are you using? I am using arduino 2.1.0. that everything works for YOU but not for me and I want to understand the problem then where? Could the IDE be the problem? the next line sets the dac with 48000hz, on one channel, to 16bit? :AudioInfo info(48000, 1, 16); does this line start dac? :music.begin(); and this copies data from array to I2S 0 working with internal DAC? : copier.copy(); if so, why is the sound played continuously, why on 2 channels? I just wish someone with experience could explain it to me.

[G-Roman1988]

look in this example, does the sound need to be played once? after that you do nothing. but the audio plays continuously as if set to repeat. one question, where to read about wav decoder how to use it?

#include "AudioTools.h"
#include "StarWars30.h"
#include"AudioCodecs/CodecWAV.h"
#include"AudioCodecs/CodecWavIMA.h"
using namespace audio_tools;

uint8_t channels = 1;
uint16_t sample_rate = 48000;
AnalogAudioStream out;

MemoryStream music(StarWars30_raw, StarWars30_raw_len);
//AudioPlayer player(music, out, AudioCodecs);
StreamCopyT<int16_t> copier(out, music); // copies sound into i2s

void setup() {

auto config = out.defaultConfig(TX_MODE);
config.sample_rate = sample_rate;
config.channels = channels;
config.bits_per_sample = 16;
out.begin(config);
//player.begin();
//player.copy();
music.begin();
if (music) {
copier.copy();
}

}

void loop() {
}

[G-Roman1988]

look in this example, does the sound need to be played once? after that you do nothing. but the audio plays continuously as if set to repeat. one question, where to read about wav decoder how to use it?

#include "AudioTools.h"
#include "StarWars30.h"
#include"AudioCodecs/CodecWAV.h"
#include"AudioCodecs/CodecWavIMA.h"
using namespace audio_tools;

uint8_t channels = 1;
uint16_t sample_rate = 48000;
AnalogAudioStream out;

MemoryStream music(StarWars30_raw, StarWars30_raw_len);
//AudioPlayer player(music, out, AudioCodecs);
StreamCopyT<int16_t> copier(out, music); // copies sound into i2s

void setup() {

auto config = out.defaultConfig(TX_MODE);
config.sample_rate = sample_rate;
config.channels = channels;
config.bits_per_sample = 16;
out.begin(config);
//player.begin();
//player.copy();
if (music) {
music.begin();
copier.copy();
}

}

void loop() {
}

[pschatzmann]

I reviewed the actual code and made a test: it stops after 30 seconds when it reaches the end.

#include "AudioTools.h"
#include "StarWars30.h"

AudioInfo info(22050, 1, 16);
I2SStream i2s;  // Output to I2S
MemoryStream music(StarWars30_raw, StarWars30_raw_len);
StreamCopy copier(i2s, music); // copies sound into i2s

void setup(){
    Serial.begin(115200);
    AudioLogger::instance().begin(Serial, AudioLogger::Info);

    auto config = i2s.defaultConfig(TX_MODE);
    config.copyFrom(info);
    i2s.begin(config);
}

void loop(){
    copier.copy();
}

In the Wiki there is a chapter about encoding and decoding...

Are you sure that you use the actual version of the library ?

[pschatzmann]

This does not make any sense: why do you call it StarWars30 ?
Your just confusing everybody!

[G-Roman1988]

I didn't want to change all the files. I apologize for misleading you. but shouldn't this be a problem for esp32? I will change the original file and see how it behaves.

[G-Roman1988]

I can't put the original file, because it gives me the error that it is bigger than the esp32 flash.

[pschatzmann]

It's described in the sketch what Partition Scheme you need to set!

[G-Roman1988]

please listen it's not good but it's cool. I connect the usb to the computer and disconnect it.
https://drive.google.com/file/d/1Gul4Oam9c5FhfANuHSLIj5pHHKslJWXH/view?usp=share_link

[pschatzmann]

Can you describe the hardware that you are using ? I don't understand your comment about USB...
There are some artifacts at the end: You can try if any change to the use_apll or auto_clear config parameters helps.
I assume you restarted it at the end. Is this correct ?
And finally it is playing too fast because you entered a wrong sample rate...

[G-Roman1988]

astfel se oprește la sfârșitul sunetului: #include "AudioTools.h"
#include "StarWars30.h"
#include"AudioCodecs/CodecWAV.h"
#include"AudioCodecs/CodecWavIMA.h"
using namespace audio_tools;

uint8_t channels = 1;
uint16_t sample_rate = 48000;
AnalogAudioStream out;
//I2SStream out;
AudioInfo info(48000, 1, 16);
MemoryStream music(StarWars30_raw, StarWars30_raw_len);
//AudioPlayer player(music, out, AudioCodecs);
StreamCopy copier(out, music); // copies sound into i2s

void setup() {
auto config = out.defaultConfig(TX_MODE);
config.copyFrom(info);
//config.use_apll = true;
config.auto_clear = true;
out.begin(config);
}

void loop() {
copier.copy();
}I will try with bluetooth and then I will write if it is good. I have a question, in audioinfo(22050, 1, 16); parameter 2 sets how many channels to work with, but for me it's still on 2 channels. how do you do it on a channel?

[pschatzmann]

AnalogAudioStream is using the I2S api of the ESP32: I2S is a stereo protocol, so you will always get 2 channels.

If you indicate 1 channel, you provide the audio in mono and the AnalogAudioStream is providing the same audio on the 2 output channels.

You can then just use either one of them since they provide the same information!

[G-Roman1988]

I understand. if i want to use single channel how should i do it and where?

[pschatzmann]

I don't understand your problem!

If you want to change this, take a look at AnalogAudioStream and do your own implementation! The easiest is to create a subclass and just change what's needed.

Here is a link to the IDF documentation https://docs.espressif.com/projects/esp-idf/en/v4.2/esp32/api-reference/peripherals/i2s.html

[G-Roman1988]

Hello! I managed to not crash with BLE. I have a little misunderstanding, when I put the following line in loop(): copier.copy(); the sound is fine but when i play it from somewhere else in the program the first milliseconds are some garbage samples and then it's the beginning of the lost sound, after that it's fine. how come? what to do? to get rid of it.

[pschatzmann]

Maybe the easiest would be to add a good portion of silence in the beginning and the end of your file (in the form of 0 values)

[G-Roman1988]

sorry, I made a mistake when I wrote, I corrected it and please give me some ideas.

[G-Roman1988]

  I've been experimenting and not very successful, I've recorded a few moments so you can hear and maybe have an idea where the problem is. the first beep is with the line: copier.copy(); in loop(){}, and the 10 beeps are without the line: copier.copy(); in loop() but the last one must be heard.my question is where and what is not correct? I bought some esp32 audio kit boards, I'm waiting for him to come and try them, maybe dac the esp32 has some problems.  

vineri.la.10-46.mp4

#include<BLECharacteristic.h>
#include<BLE2902.h>
#include<BLEAdvertisedDevice.h>
#include<BLEDevice.h>
#include<BLEUtils.h>
#include<BLEBeacon.h>
#include<BLEServer.h>
#include "AudioTools.h"
#include "beep.h"
using namespace audio_tools;
AudioInfo info(48000, 1, 16);
void sunet();
void chemare();
void stopchemare();
AnalogAudioStream out;
MemoryStream music(Beep_array, BeepArray_len);
StreamCopy copier(out, music, 4096);

BLEAdvertising *pAdvertising;
BLEServer *pServer = NULL;
BLECharacteristic * pTxCharacteristic;
bool deviceConnected = false;
bool oldDeviceConnected = false;
bool notificare = false;
bool StatusBeep =false;
String mesagiValue = "salut";
int slen = mesagiValue.length();
uint8_t txValue[100];
int perioada = 10, contor =0;
#define BUUID "A134D0B2-1DA2-1BA7-C94C-E8E00C9F7A2D"
#define SERVICE_UUID "6E400001-B5A3-F393-E0A9-E50E24DCCA9E" // UART service UUID
#define CHARACTERISTIC_UUID_RX "6E400002-B5A3-F393-E0A9-E50E24DCCA9E"
#define CHARACTERISTIC_UUID_TX "6E400003-B5A3-F393-E0A9-E50E24DCCA9E"

hw_timer_t *My_timer = NULL;
void IRAM_ATTR onTimer(){
sunet();
contor++;
}

class MyServerCallbacks: public BLEServerCallbacks {
void onConnect(BLEServer* pServer) {
deviceConnected = true;
Serial.print("este o conectare noua");
};

void onDisconnect(BLEServer* pServer) {
  deviceConnected = false;

Serial.print("clientul sa deconectat");
pServer->startAdvertising();
Serial.println("start advertising");
if (StatusBeep)
stopchemare();
}
};

class MyCallbacks: public BLECharacteristicCallbacks {
void onWrite(BLECharacteristic *pCharacteristic) {
std::string rxValue = pCharacteristic->getValue();
Serial.print(rxValue.c_str());

if (rxValue.find("1") != -1) {
chemare();
Serial.println("sa livrat 1");
}
if(rxValue.find("0") != -1){
stopchemare();
Serial.println("sa livrat 0");
}
}
};
void personalserver(){
pServer = BLEDevice::createServer();
pServer->setCallbacks(new MyServerCallbacks());
BLEService *pService = pServer->createService(SERVICE_UUID);
pTxCharacteristic = pService->createCharacteristic(CHARACTERISTIC_UUID_TX, BLECharacteristic::PROPERTY_NOTIFY);
pTxCharacteristic->addDescriptor(new BLE2902());

BLECharacteristic * pRx = pService->createCharacteristic(CHARACTERISTIC_UUID_RX, BLECharacteristic::PROPERTY_WRITE);
pRx->setCallbacks(new MyCallbacks());
pService->start();
//pAdvertising = pServer->getAdvertising()->start();
}

void personalBeacon()
{
pAdvertising = pServer->getAdvertising();
BLEBeacon myBeacon;
myBeacon.setManufacturerId(0x4c00);
myBeacon.setMajor(5);
myBeacon.setMinor(88);
myBeacon.setSignalPower(0xc5);
myBeacon.setProximityUUID(BLEUUID(BUUID));
BLEAdvertisementData advertisementData;
advertisementData.setFlags(0x1A);
advertisementData.setManufacturerData(myBeacon.getData());
pAdvertising->setAdvertisementData(advertisementData);
// pAdvertising->setAdvertisementType(ADV_TYPE_IND);

pAdvertising->start();

}
void setup() {
My_timer = timerBegin(0, 80, true);
timerAttachInterrupt(My_timer, &onTimer, true);
timerAlarmWrite(My_timer, 1000000, true);
//timerAlarmEnable(My_timer);

Serial.begin(115200);
BLEDevice::init("punct de emiter");
personalserver();
personalBeacon();
Serial.println("asteptam o conectare ...");
auto config = out.defaultConfig(TX_MODE);
config.copyFrom(info);
config.auto_clear = true;

out.begin(config);
}
void chemare(){
StatusBeep = true;
timerAlarmEnable(My_timer);
sunet();
}
void stopchemare(){
StatusBeep = false;
timerAlarmDisable(My_timer);
contor = 0;
}
void sunet(){
music.begin();
do {
copier.copy();
}while (!copier.copy());
music.end();
}

void loop() {
//copier.copy();
/if (deviceConnected) {
for (int i = 0; i < slen; i++)
txValue[i] = mesagiValue[i];
pTxCharacteristic->setValue(txValue, slen);
pTxCharacteristic->notify();
delay(500);
}/
if (contor >= perioada)
stopchemare();

      }

[G-Roman1988]

Hello! ru I have experimented with DEFAULT_BUFFER_SIZE, I2S_BUFFER_SIZE, I2S_BUFFER_COUNT, StreamCopy copier(out, music, 2048); and it is not a positive result, but rather a negative one. is it possible to check the buffer first, if there is anything in it, if so clear everything from the buffer, then copy the data and after playing the sound, clear everything from the buffer? my feeling is that something is wrong with sending data to I2S with analogaudiostream. who makes such artifacts. in the previous message I attached an audio file of how it sounds in different experiments, only the last beep is played from the PC, so that you can hear the difference, how it should sound on the esp32.

[G-Roman1988]

I have installed the latest version of arduino audio tools library 0.9.6 and esp32 2.09.

[G-Roman1988]

Hello! please help me. I am trying my best to solve my problem with analogaudiostream (internal DAC). I change the following variables: DEFAULT_BUFFER_SIZE, I2S_BUFFER_SIZE, I2S_BUFFER_COUNT from the AudioConfig.h file. și nu pot să înțeleg, dece nu redă sunetul corect? by DVS documentation from arduino audio tools it was written that we can create AudioConfig.h file locally, but how do we do it? I copy it to the folder with the sketch I'm working on and change the variables there and when I compile I automatically get them from the local file or do I have to include it? please help me .

[pschatzmann]

Why don't you look at this example which uses a local config file

[G-Roman1988]

thanks for the suggestion with the AudioConfigLocal.h file.I want to ask you to help me with my problem which is playing the sound properly with a suggestion . I looked in the matrix and at the end there were some zeros, I deleted those zeros and the variable that is indicated the size of the matrix I subtracted how many zeros I deleted. when I uncomment the line :copier.copy(); dini loop() the sound is good but at the end there is noise, if I comment the line only when I send 1 from the phone via bluetooth the first time it sounds noisy and different but after that the next times when the sound is repeated the sound is acceptable. the question. how to get rid of the noise? how do i reset I2S_BUFFER_SIZE, BUFFER_SIZE or clear everything from them first then copy the data? please give me a suggestion.

[pschatzmann]

I suggest that you stick to the recommendation given in the Wiki: https://github.com/pschatzmann/arduino-audio-tools/wiki/MemoryStream:-Converting-a-File-to-Flash-Memory

[G-Roman1988]

I followed exactly as it says on the wiki. but the problem remains the same.could it be from the frequency? I converted the wav file to 16 bit 48000 HZ mono. I ran out of ideas. please help me this is important for me.

[G-Roman1988]

hello, I still managed. I just changed the line to play the sound and then started the timer. thank you for your help.