Can't get allow_boost to work in VolumeStream

[MarcelBiermans]

First of all, I really love this library and it has been a breeze to set up until I tried boosting the volume.

It seems that in my code, the VolumeStreamConfig is ignored by the VolumeStream. No matter how I configure it, when calling volume.begin(vcfg), allow_boost seems to remain false, confirmed by the fact that any volume > 1.0 will result in the error "[E] VolumeStream.h : 192 - Invalid volume: 1.36". other than the boost not working, the volume control between 0 and 1 is working as expected.

I am probably missing something, though I think I followed the wiki example as much as possible. Any insight and help is appreciated, I am completely stuck.

this is my code:

#include "AudioTools.h"
#include "AudioTools/AudioCodecs/CodecMP3Helix.h"

const char* ssid = "****";
const char* password = "****";

const char* streamURLs[] = {
    "****",
    "****"
};

const int numStreams = sizeof(streamURLs) / sizeof(streamURLs[0]);
int currentStreamIndex = 0; 

// Button setup
const int interruptPin = 19;
const int channelSelectPotPin = 34;
const int volumePotPin =35;

URLStream url(ssid,password);
I2SStream i2s; // final output of decoded stream
VolumeStream volume(i2s);
EncodedAudioStream dec(&volume, new MP3DecoderHelix()); // Decoding stream
StreamCopy copier(dec, url); // copy url to decoder

void setup(){
  Serial.begin(115200);
  AudioToolsLogger.begin(Serial, AudioLogger::Info); 
    
  pinMode(interruptPin, INPUT_PULLUP);
  pinMode(volumePotPin, INPUT_PULLUP);
  pinMode(channelSelectPotPin, INPUT_PULLUP);

  // setup i2s
  I2SConfig config = i2s.defaultConfig(TX_MODE);
  config.pin_ws = 32;
  config.pin_bck = 33;
  config.pin_data = 27;
  config.sample_rate = 44100;
  config.bits_per_sample = 16;
  config.channels = 2;
  config. i2s_format = I2S_STD_FORMAT;
  i2s.begin(config);
  
  dec.begin();
  
  // set initial volume
  VolumeStreamConfig vcfg = volume.defaultConfig();
  vcfg.set(config);
  vcfg.allow_boost = true; // activate amplification using linear control
  volume.begin(vcfg);

    // mp3 radio
    Serial.println("begin stream");
    delay(3000);
    url.begin(streamURLs[currentStreamIndex],"audio/mp3"); 
}

void loop(){
    //play if not interrupted
    if(digitalRead(interruptPin) != LOW) {
        copier.copy();
    }

    int volumePotValue = analogRead(volumePotPin);
    volume.setVolume((double)volumePotValue/3000);

    int channelPotValue = analogRead(channelSelectPotPin);
    int targetStreamIndex = channelPotValue / (4096/(numStreams));
    if(targetStreamIndex != currentStreamIndex){
        currentStreamIndex = targetStreamIndex;
        url.begin(streamURLs[currentStreamIndex], "audio/mp3");
    }
}

[pschatzmann]

I can't reproduce your issue:

[G-Roman1988]

I have a question about how I control the volume of flow when I play a WAV file from the ESP32 memory with Memorystream. With "audiotools/audiocodecs/codecmp3helix.h" is information, but I found nothing.

[pschatzmann]

Please read the Uncyclo: Volume Control and Panning