codepend~ block convolution processor codepend~ is a classic "block convolution" processor. performs a complex multiply upon the spectra of two input signals. Multiplication of spectra can cause significant drops in the amplitude of the output signal. The invert message causes codepend~ to perform complex division of the input spectra rather than multiplication. This can cause huge amplitude gains. Careful switching between multiplies and divides, such is not recommended during performance without careful gain handling.

from the library : FFTease Format : External Environment : msp / PD freeware Max 3.x / 4.x http://www.sarc.qub.ac.uk/~elyon/LyonSoftware/MaxMSP/FFTease/