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Extract formant features such as frequency, power, energy, and bandwidth of formants at syllable or word level from audio sources in a web browser using WebAudio API.

License: Apache License 2.0

JavaScript 82.23% CSS 12.15% HTML 5.62%
audio-analysis audio-processing feature feature-engineering feature-extraction formant formant-detection music music-visualizer signal-processing spectrum-analyzer speech-processing

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formantanalyzer.js's Issues

Output level 2 with spec type level 1 returns 200 bins no matter what config value is set.

When I set my config like this

      let launch_config = {
        plot_enable: false,
        spec_type: 1, //mel
        output_level: 2, //spectrum
        f_min: 0,
        f_max: 5000,
        plot_len: 16,
        min_seg_length: 10,
        N_mel_bins: 30,
        window_width: 512,
        window_step: 256,
        auto_noise_gate: false,
        voiced_min_dB: 0,
        voiced_max_dB: 80,
        pre_norm_gain: 1000,
        high_f_emph: 0.0,
      };

my callback like this

async function callback(
        seg_index,
        seg_label,
        seg_time,
        extracted_features
      ) {
        console.log("extracted_features", extracted_features);
    }

In my browser it shows there are 200 bins, not 16 like i specify in plot_len

console log below

extracted_features (200) [Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), Uint32Array(30), …]

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