A destructor is present on this object, but not explicitly documented in the source.
To call at initialization and whenever samplerate changes. windowSize = size of window, expressed in samples fftSize = size of FFT. Must be power-of-two and >= windowSize. Missing samples are zero-padded in time domain. analysisPeriod = period of analysis results, allow to be more precise frequentially, expressed in samples. Basic overlap is achieved with windowSize = 2 * analysisPeriod if zeroPhaseWindowing = true, "zero phase" windowing is used (center of window is at first sample, zero-padding happen at center)
Gets the RFFT object which allows to perform efficient incverse FFT with the same pre-computed tables.
From a signal, output short term FFT data. Variable overlap. Introduces approximately windowSize/2 samples delay. Uses a real FFT to gain some speed.