the output (buffer) of an FFT UGen which transforms the audio input to track. For the FFT chain, with a standard hop of half FFT size, the FFT size should be 1024 at 44.1 or 48 kHz and 2048 at 88.2 or 96 kHz sampling rate.
the number of coefficients, defaults to 13, maximum of
42; more efficient to use less of course! Since this
number determines the number of output channels of the
UGen, it has to be an