...
The IIR decimator module implements an IIR low-pass filter followed by a downsampler. The IIR low-pass filter is implemented as an 8th order elliptical filter. The module variable cutoffFreq must be smaller than Fs*0.5/D, where Fs is the sampling rate and D is the decimation factor.
This module excepts accepts any input block size.
The output block size equals the input block size divided by the decimation factor D.
The output sample rate equals the input sample rate divided by D.
...