How do I get the amplitude?

[icnahom]

I needed a double (0.0-1.0) value of the amplitude of the currently playing audio.

[alnitak]

I suggest you to look at this and read the doc of audio_data which is responsible for getting audio data.

If you mean to get the current output volume, it is not yet available!

[icnahom]

Yes I wanted to increase the circle background of a Bot as it speaks. Can you think of any workarounds I could try?

[alnitak]

Yes, using audio_data, you can get the audio data as linear which gives you a Float32List with 256 floats of wave data and the other 256 of FFT data. I think that using the FFT is what you are looking for.

So the procedure could be to do an average of values from about 20(+256) to about 70(+256) of the list and the result could be used to "bounce" the circle.

I just released an audio visualizer package that could inspire you: audio_flux

[icnahom]

Thanks for sharing the package, I will look into it.

Quick test of the approach mentioned gave me a working result, expect it seems to mostly be in the range 0.0 to 0.39.

    double? average;
    final samples = audioData.getAudioData(alwaysReturnData: true);
    if (samples.isNotEmpty) {
      final fttData = samples.sublist(20, 70);
      final sum = fttData.fold<double>(0, (sum, e) => sum + e);
      average = sum / fttData.length;
    }
    
    print(average);

[icnahom]

in the range 0.0 to 0.39.

Nvm, volume: 0.5 was set :)