ChucK | Programming Guide

Unit Analyzers

basic UAna classes:
UAna UAnaBlob Windowing

transformations:
FFT IFFT DCT IDCT

feature extractors:
Centroid Flux RMS RollOff

much more to come!

Standard UAnae
basic uana classes
[uana] UAna	base class from which all unit analyzers (UAnae) inherit UAnae (note plural form) can be interconnected via => (standard chuck operator) or via =^ (upchuck operator)... see UAna Documentation in the language specification.
[object] UAnaBlob	the carrier of data between UAnae contents include arrays of floats and complex values updated and returned as result of UAna's .upchuck() operation
[object] Windowing	generates common FFT windows types include Rectangular, Barlett, Hann, Hamming, Blackmann
domain transformations
[uana] FFT	Fast Fourier Transform takes FFT's at arbitrary window, fft, hop sizes outputs both complex and real spectra
[uana] IFFT	Inverse Fast Fourier Transform input spectral frames output overlapped-added time-domain samples
[uana] DCT	Discrete Cosine Transform (type II) (um, it's not "fast")
[uana] IDCT	Inverse Discrete Cosine Transform (DCT Type III) (um, it's not "fast")
feature extractors
[uana] Centroid	from magnitude spectrum, compute center of mass
[uana] Flux	from magnitude spectrum, compute spectral flux across frames
[uana] RMS	from magnitude spectrum, compute RMS power mean
[uana] RollOff	from magnitude spectrum, compute RollOff (settable percentage)