frequencyToFFTBin()

float fl::audio::FrequencyBinMapper::frequencyToFFTBin ( float frequency ) const

private

Convert frequency (Hz) to FFT bin index.

Parameters

frequency

Frequency in Hz

Returns

FFT bin index (may be fractional)

Definition at line 114 of file frequency_bin_mapper.cpp.hpp.

                                                                 {
    // fft::FFT bin index = (frequency / sampleRate) * fftSize
    // fftSize = fftBinCount * 2 (fft::FFT produces fftSize/2 bins)
    const float fftSize = static_cast<float>(mConfig.fftBinCount) * 2.0f;
    return (frequency / static_cast<float>(mConfig.sampleRate)) * fftSize;
}

References mConfig.

Referenced by calculateBinMappings().

Here is the caller graph for this function: