Volume control

[thanhduong0213929]

Hello pschatzmann, I have an issue. How can I combine Volume Stream and Equalizer in the same program? I have tried the following:
AudioInfo info(44100, 2, 16);
I2SStream out1;
OutputMixer<int16_t> mixer(out1, 2);

VolumeStream volume1(out1);
LinearVolumeControl lvc(true);
Equilizer3Bands eq1(volume1);
BluetoothA2DPSink a2dp_sink(eq1);
ConfigEquilizer3Bands cfg_eq1;

AnalogAudioStream adcin;
VolumeStream volume2(adcin);
Equilizer3Bands eq2(volume2);
Delay dly(500, 0.5, 0.4, 44100);
AudioEffectStream effects(eq2);
ConfigEquilizer3Bands cfg_eq2;

StreamCopy copier1(mixer, effects);

//////////////////////////////////////
//setup
a2dp_sink.start("Speaker");

auto cfgo = out1.defaultConfig();
cfgo.copyFrom(info);
cfgo.port_no = 1;
cfgo.pin_bck = 21;
cfgo.pin_ws = 22;
cfgo.pin_data = 23;
out1.begin(cfgo);

//setup equilizer
cfg_eq1 = eq1.defaultConfig();
cfg_eq1.setAudioInfo(cfgo);
cfg_eq1.gain_low = 0.3;
cfg_eq1.gain_medium = 0.3;
cfg_eq1.gain_high = 0.3;
cfg_eq1.volume = 0.3;
eq1.begin(cfg_eq1);

auto vcfg1 = volume1.defaultConfig();
vcfg1.copyFrom(cfgo);
volume1.setVolumeControl(lvc);
volume1.begin(vcfg1);
volume1.setVolume(0.3);

// micro
auto cfgRx = adcin.defaultConfig(RX_MODE);
cfgRx.channels = 39;
cfgRx.sample_rate = 44100;
adcin.begin(cfgRx);

//convert2.begin(16, 24);
effects.addEffect(dly);
effects.begin(info);

auto vcfg2 = volume2.defaultConfig();
vcfg2.copyFrom(cfgRx);
volume2.begin(vcfg2);
volume2.setVolume(0.3);

// setup equilizer
cfg_eq2 = eq2.defaultConfig();
cfg_eq2.setAudioInfo(cfgRx);
cfg_eq2.gain_low = 0.3;
cfg_eq2.gain_medium = 0.3;
cfg_eq2.gain_high = 0.3;
eq2.begin(cfg_eq2);

mixer.begin();

But when I adjust the volume using volume1.setVolume inside a loop, the sound does not change, though the equalizer does. Could you help me fix this issue, please?

[pschatzmann]

I don't see any reason why this should not work. However I recommend to use a linear volume control only if you regulate the volume with an Audio Pot.

In addition your default settings are much too low: you get as result of the combination 0.3 * 0.3 = 0.09 as resulting volume