dplug.dsp.fft

Members

Functions

convertFFTBinToFrequency

float convertFFTBinToFrequency(float fftBin, int fftSize, float samplingRate)

Converts a FFT bin to a frequency. Returns: Corresponding center frequency.

convertFFTBinToFrequencyInv

float convertFFTBinToFrequencyInv(float fftBin, float invFFTSize, float samplingRate)

Converts a FFT bin to a frequency. Returns: Corresponding center frequency.

convertFFTBinToNormalizedFrequency

float convertFFTBinToNormalizedFrequency(float fftBin, int fftSize)

Converts a FFT bin to a normalized frequency. Params: fftBin = Bin index in the FFT. fftSize = Size of FFT.

convertFFTBinToNormalizedFrequencyInv

float convertFFTBinToNormalizedFrequencyInv(float fftBin, float invFFTSize)

Converts a FFT bin to a normalized frequency. Params: fftBin = Bin index of the FFT. invFFTSize = Inverse size of FFT.

convertFrequencyToFFTBin

float convertFrequencyToFFTBin(float frequencyHz, float samplingRate, int fftSize)

Converts a frequency to a FFT bin. Returns: Corresponding fractional bin.

convertFrequencyToFFTBinInv

float convertFrequencyToFFTBinInv(float frequencyHz, float invSamplingRate, int fftSize)

Converts a frequency to a FFT bin. Returns: Corresponding fractional bin.

convertNormalizedFrequencyToFFTBin

float convertNormalizedFrequencyToFFTBin(float normalizedFrequency, int fftSize)

Converts a normalized frequency to a FFT bin. Params: normalizedFrequency = Frequency in cycles per sample. fftSize = Size of FFT.

forwardFFT

void forwardFFT(BuiltinComplex!T[] buffer)

Perform in-place FFT. Equivalent to std.numeric.fft, but this one is nothrow @nogc.

inverseFFT

void inverseFFT(BuiltinComplex!T[] buffer)

Perform in-place inverse FFT. Equivalent to std.numeric.inverseFft, but this one is nothrow @nogc.

Structs

FFTAnalyzer

struct FFTAnalyzer(T)

From a signal, output short term FFT data. Variable overlap. Introduces approximately windowSize/2 samples delay. Uses a real FFT to gain some speed.

RFFT

struct RFFT(T)

Perform a FFT from a real signal, saves up CPU.

Segmenter

struct Segmenter(T)

From a signal, output chunks of determined size, with optional overlap. Introduces approximately windowSize/2 samples delay.

ShortTermReconstruction

struct ShortTermReconstruction

From short term windowed data, output the summed signal. Segments can be irregular and have different size.

• delayline
• envelope
• fft
• fir
• iir
• noise
• smooth
• wavetable
• window