VolumeStream allow_boost ignored?

[z-l-p]

Hi. I have used VolumeStream often, with good results, but in my current application (with several processes in the signal chain) I'm having problems with allow_boost .

In the sketch below, the VolumeStream.setVolume switches between 0.5, 1.0 and 1.5 at intervals, to trigger this error:
[E] VolumeStream.h : 192 - Invalid volume: 1.500000
(This is simplified from a larger project with multiple codecs and format conversion. I think I set up VolumeStream correctly, but I must have missed something?)

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

const char *ssid = "";          // Change this to your WiFi SSID
const char *password = "";  // Change this to your WiFi password

AudioInfo out_info(44100, 2, 16); // destination format for I2S (all streams will be converted to this)
URLStream url;
I2SStream i2s;
VolumeStream vol(i2s);
FormatConverterStream conv(vol);
MultiDecoder multi(url);
MP3DecoderHelix mp3;
EncodedAudioStream dec(&conv, &multi); // Decoding stream
StreamCopy copier(dec, url); // copy url to decoder

float myVol = 1.0;

void setup(){
  Serial.begin(115200);
  Serial.println();
  Serial.println("******************************************************");
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Warning);  
  
  // setup i2s
  auto config = i2s.defaultConfig(TX_MODE);
  config.copyFrom(out_info);
  // Custom I2S pins for my Xaio board
  config.pin_ws = 9; // (DAC "LRCK")
  config.pin_bck = 7; // (DAC "BCK")
  config.pin_data = 8; // (DAC "DIN")
  i2s.begin(config);

// setup VolumeStream
  auto vcfg = vol.defaultConfig();
  vcfg.allow_boost = true; // activate amplification using linear control
  vol.begin(vcfg);

  // setup audio converter
  conv.begin(multi.audioInfo(), out_info);

  // setup decoder
  multi.addDecoder(mp3, "audio/mpeg");
  dec.begin();
  url.begin("https://locus.creacast.com:9443/san_antonio_phil_hardberger_park.mp3"); 
}

void loop() {
  copier.copy();
  static uint32_t lastChangeTime;
    if(millis() - lastChangeTime > 1000){
      if(myVol == 1.0) {
        myVol = 1.5;
      } else if (myVol == 1.5) {
        myVol = 0.5;
      } else if (myVol == 0.5) {
        myVol = 1.0;
      }
      vol.setVolume(myVol);
      Serial.println(myVol);

    lastChangeTime = millis();
  }
  
}

[pschatzmann]

I committed a correction to keep the value even when setAudioInfo() is called.

[z-l-p]

Confirmed fixed. Thanks so much!