Method filterFreqInSfxrUnits

src/extended/SfxrNode.cpp:1167–1175

    return OVERSAMPLING * 44100.0f * flurp(cube(sfxr) / 10);
}
float SfxrNode::filterFreqInSfxrUnits(float hz)
{
    if (hz >= 44100.0f)
        return 1.0f;

    // if y = K x / (1 - x), then x = y / (y + K)
    float s3 = hz / (hz + (OVERSAMPLING * 44100.0f));
    return powf(s3, 1.0f / 3.0f);
}

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