calculateMakeupGain()

float fl::audio::SpectralEqualizer::calculateMakeupGain ( span< const float > inputBins, span< const float > outputBins ) const

private

Calculate makeup gain to maintain target level.

Parameters

inputBins	Input frequency bins
outputBins	Output frequency bins (after EQ)

Returns

Makeup gain multiplier

Definition at line 189 of file spectral_equalizer.cpp.hpp.

                                                                                                            {
    // Calculate average levels
    float inputAvg = 0.0f;
    float outputAvg = 0.0f;
 
    for (size i = 0; i < mConfig.numBands; ++i) {
        inputAvg += inputBins[i];
        outputAvg += outputBins[i];
    }
 
    inputAvg /= static_cast<float>(mConfig.numBands);
    outputAvg /= static_cast<float>(mConfig.numBands);
 
    // Avoid division by zero
    if (outputAvg < 0.001f) {
        return 1.0f;
    }
 
    // Calculate makeup gain to bring output to target level
    // Target is relative to input average
    float targetLevel = inputAvg * mConfig.makeupGainTarget;
    float makeupGain = targetLevel / outputAvg;
 
    // Clamp to reasonable range (0.1 to 10.0)
    if (makeupGain < 0.1f) {
        makeupGain = 0.1f;
    }
    if (makeupGain > 10.0f) {
        makeupGain = 10.0f;
    }
 
    return makeupGain;
}

References mConfig.

Referenced by apply().

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