Method numberOfPartialsForRange

src/core/PeriodicWave.cpp:120–132

}

int PeriodicWave::numberOfPartialsForRange(int rangeIndex) const
{
    // Number of cents below nyquist where we cull partials.
    float centsToCull = rangeIndex * m_centsPerRange;

    // A value from 0 -> 1 representing what fraction of the partials to keep.
    float cullingScale = powf(2, -centsToCull / 1200.f);

    // The very top range will have all the partials culled.
    int numberOfPartials = static_cast<int>(cullingScale * maxNumberOfPartials());

    return numberOfPartials;
}

// Convert into time-domain wave tables.
// One table is created for each range for non-aliasing playback at different playback rates.