Institute for International Research, Inc. (IIR) was a subsidiary of Informa Plc. It grew from its founding in 1973 to become one of the world's largest conference providers. It became part of the Informa Group in 2005.
In 2015, Informa rebranded its conference and training businesses, including IIR, KNect365.
I am experimenting with GNU Radio (using the Companion graphical editor) to do some simple audio processing.
As my first experiment, I am trying to set up a very simple 2nd order IIR filter at 170 Hz with a sample rate of 16000 samples/sec. I used this Mathematica code to find the taps...