Cycling '74 RNBO RNBO Filters Two-pole, two-zero filter

Two-pole, two-zero filter

biquad~ implements a two-pole, two-zero filter using the following equation:

y[n] = a0 * x[n] + a1 * x[n-1] + a2 * x[n-2] - b1 * y[n-1] - b2 * y[n-2]

You can specify the coefficients a0, a1, a2, b1, and b2 as signals or floats (if you make the filter explode by making the b coefficients too high, you can recover (after lowering them) with the clear message, or by turning the audio on and off).

Input Gain (FF Coefficient 0)

Set the value for the a0 filter coefficient. If a signal is connected to the second inlet, the coefficient supplied as an argument is ignored.

FF Coefficient 1

Set the value for the a1 filter coefficient. If a signal is connected to the third inlet, the coefficient supplied as an argument is ignored.

FF Coefficient 2

Set the value for the a2 filter coefficient. If a signal is connected to the fourth inlet, the coefficient supplied as an argument is ignored.

FB Coefficient 1

Set the value for the b1 filter coefficient. If a signal is connected to the fifth inlet, the coefficient supplied as an argument is ignored.

FB Coefficient 2

Set the value for the b2 filter coefficient. If a signal is connected to the sixth inlet, the coefficient supplied as an argument is ignored.

Input Gain (FF Coefficient 0)

Set the value for the a0 filter coefficient. If a signal is connected to the second inlet, the coefficient supplied as an argument is ignored.

FF Coefficient 1

Set the value for the a1 filter coefficient. If a signal is connected to the third inlet, the coefficient supplied as an argument is ignored.

FF Coefficient 2

Set the value for the a2 filter coefficient. If a signal is connected to the fourth inlet, the coefficient supplied as an argument is ignored.

FB Coefficient 1

Set the value for the b1 filter coefficient. If a signal is connected to the fifth inlet, the coefficient supplied as an argument is ignored.

FB Coefficient 2

Set the value for the b2 filter coefficient. If a signal is connected to the sixth inlet, the coefficient supplied as an argument is ignored.

Banging this attribute will reset the object to its default state. Input

The signal to be filtered.

Input

The signal to be filtered.

Input Gain (FF Coefficient 0)

Set the value for the a0 filter coefficient. If a signal is connected to the second inlet, the coefficient supplied as an argument is ignored.

FF Coefficient 1

Set the value for the a1 filter coefficient. If a signal is connected to the third inlet, the coefficient supplied as an argument is ignored.

FF Coefficient 2

Set the value for the a2 filter coefficient. If a signal is connected to the fourth inlet, the coefficient supplied as an argument is ignored.

FB Coefficient 1

Set the value for the b1 filter coefficient. If a signal is connected to the fifth inlet, the coefficient supplied as an argument is ignored.

FB Coefficient 2

Set the value for the b2 filter coefficient. If a signal is connected to the sixth inlet, the coefficient supplied as an argument is ignored.

Filtered output

The filtered signal.