class:: BPZ2
summary:: Two zero fixed midpass.
related:: Classes/BRZ2, Classes/HPZ2, Classes/LPZ2
categories::  UGens>Filters>Linear


Description::

A special case fixed filter. Implements the formula:

code::
out(i) = 0.5 * (in(i) - in(i - 2)).
::

This filter cuts out 0 Hz and the Nyquist frequency.


classmethods::

method::ar, kr

argument::in

The input signal.

Examples::

code::
//Compare:

{ WhiteNoise.ar(0.25) }.play;

{ BPZ2.ar(WhiteNoise.ar(0.25)) }.play;
::

