Two-zero, two-pole filter. More...
#include <mo_filter.h>
Public Member Functions | |
| MoBiQuad () | |
| default constructor creates a second-order pass-through filter | |
| ~MoBiQuad () | |
| destructor | |
| void | setCoefficients (SAMPLE b0, SAMPLE b1, SAMPLE b2, SAMPLE a1, SAMPLE a2, bool clearState=false) |
| set all filter coefficients | |
| void | setB0 (SAMPLE b0) |
| set the b[0] coefficient value | |
| void | setB1 (SAMPLE b1) |
| set the b[1] coefficient value | |
| void | setB2 (SAMPLE b2) |
| set the b[2] coefficient value | |
| void | setA1 (SAMPLE a1) |
| set the a[1] coefficient value | |
| void | setA2 (SAMPLE a2) |
| set the a[2] coefficient value | |
| void | setResonance (SAMPLE frequency, SAMPLE radius, bool normalize=false) |
| void | setNotch (SAMPLE frequency, SAMPLE radius) |
| void | setEqualGainZeroes () |
| SAMPLE | tick (SAMPLE input) |
| input one sample to the filter and return a reference to one output | |
Two-zero, two-pole filter.
| MoBiQuad::MoBiQuad | ( | ) |
default constructor creates a second-order pass-through filter
| MoBiQuad::~MoBiQuad | ( | ) |
destructor
| void MoBiQuad::setA1 | ( | SAMPLE | a1 | ) | [inline] |
set the a[1] coefficient value
| void MoBiQuad::setA2 | ( | SAMPLE | a2 | ) | [inline] |
set the a[2] coefficient value
| void MoBiQuad::setB0 | ( | SAMPLE | b0 | ) | [inline] |
set the b[0] coefficient value
| void MoBiQuad::setB1 | ( | SAMPLE | b1 | ) | [inline] |
set the b[1] coefficient value
| void MoBiQuad::setB2 | ( | SAMPLE | b2 | ) | [inline] |
set the b[2] coefficient value
| void MoBiQuad::setCoefficients | ( | SAMPLE | b0, | |
| SAMPLE | b1, | |||
| SAMPLE | b2, | |||
| SAMPLE | a1, | |||
| SAMPLE | a2, | |||
| bool | clearState = false | |||
| ) |
set all filter coefficients
| void MoBiQuad::setEqualGainZeroes | ( | ) |
sets the filter zeroes for equal resonance gain. when using the filter as a resonator, zeroes places at z = 1, z = -1 will result in a constant gain at resonance of 1 / (1 - R), where R is the pole radius setting.
| void MoBiQuad::setNotch | ( | SAMPLE | frequency, | |
| SAMPLE | radius | |||
| ) |
set the filter coefficients for a notch at frequency (in Hz) this method determines the filter coefficients corresponding to two complex-conjugate zeros with the given frequency (in Hz) and radius from the z-plane origin. No filter normalization is attempted.
| void MoBiQuad::setResonance | ( | SAMPLE | frequency, | |
| SAMPLE | radius, | |||
| bool | normalize = false | |||
| ) |
sets the filter coefficients for a resonance at frequency (in Hz) this method determines the filter coefficients corresponding to two complex-conjugate poles with the given frequency (in Hz) and radius from the z-plane origin. If normalize is true, the filter zeros are placed at z = 1, z = -1, and the coefficients are then normalized to produce a constant unity peak gain (independent of the filter gain parameter). The resulting filter frequency response has a resonance at the given frequency. The closer the poles are to the unit-circle (radius close to one), the narrower the resulting resonance width.
| SAMPLE MoBiQuad::tick | ( | SAMPLE | input | ) |
input one sample to the filter and return a reference to one output
1.7.1
