calculateBeatAccent()

float fl::audio::detector::Downbeat::calculateBeatAccent ( const fft::Bins & fft, float bassEnergy )

private

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

                                                                        {
    // Accent detection combines multiple factors:
    // 1. Energy increase (stronger accent = more energy)
    // 2. Bass energy (downbeats typically have more bass)
    // 3. Spectral flux (onset strength)
 
    // Energy increase relative to previous beat
    float energyRatio = 1.0f;
    if (mPreviousEnergy > 1e-6f) {
        energyRatio = bassEnergy / mPreviousEnergy;
    }
 
    // Calculate overall energy
    float totalEnergy = 0.0f;
    for (size i = 0; i < fft.raw().size(); i++) {
        totalEnergy += fft.raw()[i];
    }
    totalEnergy /= static_cast<float>(fft.raw().size());
 
    // Bass ratio (downbeats typically have relatively more bass)
    float bassRatio = 1.0f;
    if (totalEnergy > 1e-6f) {
        bassRatio = bassEnergy / totalEnergy;
    }
 
    // Combine factors (weighted average)
    float accent = (energyRatio * 0.4f) + (bassRatio * 0.3f) + (totalEnergy * 0.3f);
 
    return accent;
}

References mPreviousEnergy.

Referenced by update().

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