The inverse fast fourier transform converts from frequency content to a signal.
The fast fourier transform analyzes the frequency content of a signal. The IFFT UGen converts this frequency-domain information back into time-domain audio data. Most often this is used as the end of a process which begins with FFT, followed by frequency-domain processing using PV (phase-vocoder) UGens, followed by IFFT.
returns a time domain signal from converting the FFT frequency domain signal chain. The *new method is equivalent to the *ar message returns an audio rate signal.
| buffer |
The FFT "chain" signal coming originally from an FFT UGen, perhaps via other PV UGens. | ||||||
| wintype |
Defines how the data is windowed:
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| winsize |
Can be used to account for zero-padding, in the same way as the FFT UGen. |
The time-domain audio signal.
The IFFT UGen converts the FFT data in-place (in the original FFT buffer) and overlap-adds the result to produce a continuous signal at its output.
// without any modification, convert FFT chain (frequency domain signal) back to audio (time domain signal)({ var in, chain; in = WhiteNoise.ar; chain = FFT(LocalBuf(2048), in); IFFT.ar(chain) * -20.dbamp // inverse FFT}.play;)