fftout~

Output for a patcher loaded by pfft~

Description

The fftout~ object provides an signal output to a pfft~ object; it won't do anything if you try to use it anywhere other than inside a patcher loaded by the pfft~ object. The fftout~ object performs an inverse Fast Fourier Transform and applies a windowing function (an envelope), allowing the pfft~ object to manage the overlap-add of the output signal windows.

Arguments

Name Type Opt Description
outlet-assignment int Obligatory. Determines the outlet number in the pfft~ which will receive the output of the fftout~ object. Outlet assignments start at 1 for the leftmost outlet of pfft~. Multiple fftout~ objects will typically have different outlet numbers.
window-envelope-function symbol opt Tells fftout~ which window envelope function to use when overlapping fft's on the input signal. The options are square (i.e. no window envelope), hanning (the default), and hamming. If the argument nofft is used, then the fftout~ will echo its input signal to its output without performing a Fast Fourier transform. This allows you to output raw control signals from the pfft~ to the parent patcher. Note that when the nofft option is used, overlap-adding is still being performed to create the output signal.

Messages

signal In left inlet: The real part of a signal that will be inverse-transformed back into the time domain.

In right inlet: The imaginary part of a signal that will be inverse-transformed back into the time domain.
Note that the real and imaginary inlets of fftout~ expect only the first half of the spectrum, as output by fftin~. This half-spectrum is called a spectral frame in pfft~ terminology.

Information for box attributes common to all objects

Output

signal: The fftout~ object transforms frequency domain signals back into the time domain, at which point they are overlap-added and output by the corresponding outlet in the pfft~ object in which the subpatcher is loaded. The fftout~ object itself has no outlets.

Examples

fftout~ converts frequency domain signal pairs into time domain signals and sends them to pfft~

See Also

Name Description
cartopol Cartesian to Polar coordinate conversion
cartopol~ Signal Cartesian to Polar coordinate conversion
fft~ Fast Fourier transform
fftin~ Input for a patcher loaded by pfft~
fftinfo~ Report information about a patcher loaded by pfft~
frameaccum~ Compute "running phase" of successive phase deviation frames
framedelta~ Compute phase deviation between successive FFT frames
ifft~ Inverse fast Fourier transform
out Message output for a patcher loaded by poly~ or pfft~
pfft~ Spectral processing manager for patchers
poltocar Polar to Cartesian coordinate conversion
poltocar~ Signal Polar to Cartesian coordinate conversion
vectral~ Vector-based envelope follower
MSP Tutorial 25: Using the FFT MSP Tutorial 25: Using the FFT
MSP Tutorial 26: Frequency Domain Signal Processing with pfft~ MSP Tutorial 26: Frequency Domain Signal Processing with pfft~